Perpetual Motion Machine [closed]












7














An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn. Assume the following true observations.





  • Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.

  • The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.

  • The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.

  • The engineer has not altered the laws of physics and is on planet Earth.




Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?










share|improve this question















closed as off-topic by Deusovi Nov 24 '18 at 2:50


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question may invite speculative answers, as the question is not fully defined. The validity of some answers may be based upon opinion. Good questions for this site have a limited number of objectively correct answers. See also: Why are questions off-topic if they invite answers which are not demonstrably correct, or are otherwise speculative?" – Deusovi

If this question can be reworded to fit the rules in the help center, please edit the question.


















    7














    An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn. Assume the following true observations.





    • Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.

    • The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.

    • The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.

    • The engineer has not altered the laws of physics and is on planet Earth.




    Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?










    share|improve this question















    closed as off-topic by Deusovi Nov 24 '18 at 2:50


    This question appears to be off-topic. The users who voted to close gave this specific reason:


    • "This question may invite speculative answers, as the question is not fully defined. The validity of some answers may be based upon opinion. Good questions for this site have a limited number of objectively correct answers. See also: Why are questions off-topic if they invite answers which are not demonstrably correct, or are otherwise speculative?" – Deusovi

    If this question can be reworded to fit the rules in the help center, please edit the question.
















      7












      7








      7







      An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn. Assume the following true observations.





      • Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.

      • The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.

      • The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.

      • The engineer has not altered the laws of physics and is on planet Earth.




      Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?










      share|improve this question















      An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn. Assume the following true observations.





      • Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.

      • The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.

      • The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.

      • The engineer has not altered the laws of physics and is on planet Earth.




      Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?







      physics






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 24 '18 at 2:49









      Deusovi

      60.8k6209265




      60.8k6209265










      asked Nov 23 '18 at 8:59









      1848

      1,884116




      1,884116




      closed as off-topic by Deusovi Nov 24 '18 at 2:50


      This question appears to be off-topic. The users who voted to close gave this specific reason:


      • "This question may invite speculative answers, as the question is not fully defined. The validity of some answers may be based upon opinion. Good questions for this site have a limited number of objectively correct answers. See also: Why are questions off-topic if they invite answers which are not demonstrably correct, or are otherwise speculative?" – Deusovi

      If this question can be reworded to fit the rules in the help center, please edit the question.




      closed as off-topic by Deusovi Nov 24 '18 at 2:50


      This question appears to be off-topic. The users who voted to close gave this specific reason:


      • "This question may invite speculative answers, as the question is not fully defined. The validity of some answers may be based upon opinion. Good questions for this site have a limited number of objectively correct answers. See also: Why are questions off-topic if they invite answers which are not demonstrably correct, or are otherwise speculative?" – Deusovi

      If this question can be reworded to fit the rules in the help center, please edit the question.






















          7 Answers
          7






          active

          oldest

          votes


















          19














          Simple explanation:




          The cart moves downhill, and the gravity force is sufficient not only to cancel the friction, but also charge the generator. This version complies with the laws of physics and all given observations.




          Of course,




          the force is applied to the cart, but it's applied by the Earth gravity, which is obviously not a human being (the observation says no human beings apply the force to the cart).







          share|improve this answer





























            3














            An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn.




            This is just like the regular fossil-fuel powered cars.




            Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.




            Which means the cart moved some distance and generator supplied power to charge the batteries.




            The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.




            The cart may be run by the motor using gasoline (for example) and still be remote controlled. The related electronics may still be powered by the batteries in question.




            The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.




            The enery supplied to the batteries was higher than what was consumed by the remote controlling related hardware in the car, even after accounting for any losses.




            The engineer has not altered the laws of physics and is on planet Earth.




            Yes, they didn't.




            Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?




            Far from it. The above explanation should help.







            share|improve this answer





























              2














              This is easy, and all answers are already fine. I'll try to gather all the conditions that needed to be true in order for the perpetual motion machine to have been true.



              Obviously, the "catch" (what makes the scenario impossible in the real world) is not energy losses not considered, but energy gains not considered. Since our system is an energy cycle, all components must be considered. Thus, the conditions are:



               1. The generator only receives kinetic energy produced by the wheels
              2. The batteries only receive electrical energy from the generator
              3. The motor only receives kinetic energy from the batteries and/or generator
              4. The wheels only receive kinetic energy from the motor


              If all of these are true, then this is indeed perpetual motion. I guess all possible answers will be instances of one of the above being false, having an unaccountd-for energy source instead.






              share|improve this answer





























                0














                It could be a:




                Gravity train which is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.







                share|improve this answer





























                  0














                  A probably very silly solution:




                  Nowhere does it say that the generator or the motor is powered by cart batteries. Engineer just attached a generator, that runs on regular fuel, a motor, that is powered by this generator, and batteries, that are charged by the wheels turning. Funny thing is that a similar system already exists. Only it gets powered by external electricity.







                  share|improve this answer





























                    0














                    Since the cart is controlled remotely, I think there are some limitations:




                    • The remote controllable distance is bound to have a limit

                    • The source of the remote control signal must somehow be supplied power


                    Of course the motor can be set to be infinitely on if there is no need for controlling power or steering. In that case it would probably qualify as perpetual motion.






                    share|improve this answer





























                      0















                      Has the engineer somehow successfully built a perpetual motion
                      machine, or is there some other explanation?




                      The engineer is cheating. He or she is broadcasting the power from the remote control.




                      Wireless power transfer (WPT), wireless power transmission, wireless
                      energy transmission (WET), or electromagnetic power transfer is the
                      transmission of electrical energy without wires as a physical link. In
                      a wireless power transmission system, a transmitter device, driven by
                      electric power from a power source, generates a time-varying
                      electromagnetic field, which transmits power across space to a
                      receiver device, which extracts power from the field and supplies it
                      to an electrical load.



                      https://en.wikipedia.org/wiki/Wireless_power_transfer







                      share|improve this answer




























                        7 Answers
                        7






                        active

                        oldest

                        votes








                        7 Answers
                        7






                        active

                        oldest

                        votes









                        active

                        oldest

                        votes






                        active

                        oldest

                        votes









                        19














                        Simple explanation:




                        The cart moves downhill, and the gravity force is sufficient not only to cancel the friction, but also charge the generator. This version complies with the laws of physics and all given observations.




                        Of course,




                        the force is applied to the cart, but it's applied by the Earth gravity, which is obviously not a human being (the observation says no human beings apply the force to the cart).







                        share|improve this answer


























                          19














                          Simple explanation:




                          The cart moves downhill, and the gravity force is sufficient not only to cancel the friction, but also charge the generator. This version complies with the laws of physics and all given observations.




                          Of course,




                          the force is applied to the cart, but it's applied by the Earth gravity, which is obviously not a human being (the observation says no human beings apply the force to the cart).







                          share|improve this answer
























                            19












                            19








                            19






                            Simple explanation:




                            The cart moves downhill, and the gravity force is sufficient not only to cancel the friction, but also charge the generator. This version complies with the laws of physics and all given observations.




                            Of course,




                            the force is applied to the cart, but it's applied by the Earth gravity, which is obviously not a human being (the observation says no human beings apply the force to the cart).







                            share|improve this answer












                            Simple explanation:




                            The cart moves downhill, and the gravity force is sufficient not only to cancel the friction, but also charge the generator. This version complies with the laws of physics and all given observations.




                            Of course,




                            the force is applied to the cart, but it's applied by the Earth gravity, which is obviously not a human being (the observation says no human beings apply the force to the cart).








                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Nov 23 '18 at 9:08









                            trolley813

                            96138




                            96138























                                3














                                An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn.




                                This is just like the regular fossil-fuel powered cars.




                                Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.




                                Which means the cart moved some distance and generator supplied power to charge the batteries.




                                The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.




                                The cart may be run by the motor using gasoline (for example) and still be remote controlled. The related electronics may still be powered by the batteries in question.




                                The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.




                                The enery supplied to the batteries was higher than what was consumed by the remote controlling related hardware in the car, even after accounting for any losses.




                                The engineer has not altered the laws of physics and is on planet Earth.




                                Yes, they didn't.




                                Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?




                                Far from it. The above explanation should help.







                                share|improve this answer


























                                  3














                                  An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn.




                                  This is just like the regular fossil-fuel powered cars.




                                  Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.




                                  Which means the cart moved some distance and generator supplied power to charge the batteries.




                                  The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.




                                  The cart may be run by the motor using gasoline (for example) and still be remote controlled. The related electronics may still be powered by the batteries in question.




                                  The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.




                                  The enery supplied to the batteries was higher than what was consumed by the remote controlling related hardware in the car, even after accounting for any losses.




                                  The engineer has not altered the laws of physics and is on planet Earth.




                                  Yes, they didn't.




                                  Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?




                                  Far from it. The above explanation should help.







                                  share|improve this answer
























                                    3












                                    3








                                    3






                                    An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn.




                                    This is just like the regular fossil-fuel powered cars.




                                    Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.




                                    Which means the cart moved some distance and generator supplied power to charge the batteries.




                                    The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.




                                    The cart may be run by the motor using gasoline (for example) and still be remote controlled. The related electronics may still be powered by the batteries in question.




                                    The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.




                                    The enery supplied to the batteries was higher than what was consumed by the remote controlling related hardware in the car, even after accounting for any losses.




                                    The engineer has not altered the laws of physics and is on planet Earth.




                                    Yes, they didn't.




                                    Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?




                                    Far from it. The above explanation should help.







                                    share|improve this answer












                                    An engineer tests a new generator by attaching it to a motor-powered cart. The generator operates such that the cart's batteries charge when the cart's wheels turn.




                                    This is just like the regular fossil-fuel powered cars.




                                    Starting from a location, the cart travels Y meters in Z seconds, where Y and Z are non-zero, non-negative numbers.




                                    Which means the cart moved some distance and generator supplied power to charge the batteries.




                                    The engineer may power the car using one single motor, which is remote controlled. No human beings are pushing the cart or otherwise applying a force to it.




                                    The cart may be run by the motor using gasoline (for example) and still be remote controlled. The related electronics may still be powered by the batteries in question.




                                    The motor's battery levels are higher after the Z seconds have passed. The readings are accurate.




                                    The enery supplied to the batteries was higher than what was consumed by the remote controlling related hardware in the car, even after accounting for any losses.




                                    The engineer has not altered the laws of physics and is on planet Earth.




                                    Yes, they didn't.




                                    Has the engineer somehow successfully built a perpetual motion machine, or is there some other explanation?




                                    Far from it. The above explanation should help.








                                    share|improve this answer












                                    share|improve this answer



                                    share|improve this answer










                                    answered Nov 23 '18 at 13:17









                                    alwayslearning

                                    26517




                                    26517























                                        2














                                        This is easy, and all answers are already fine. I'll try to gather all the conditions that needed to be true in order for the perpetual motion machine to have been true.



                                        Obviously, the "catch" (what makes the scenario impossible in the real world) is not energy losses not considered, but energy gains not considered. Since our system is an energy cycle, all components must be considered. Thus, the conditions are:



                                         1. The generator only receives kinetic energy produced by the wheels
                                        2. The batteries only receive electrical energy from the generator
                                        3. The motor only receives kinetic energy from the batteries and/or generator
                                        4. The wheels only receive kinetic energy from the motor


                                        If all of these are true, then this is indeed perpetual motion. I guess all possible answers will be instances of one of the above being false, having an unaccountd-for energy source instead.






                                        share|improve this answer


























                                          2














                                          This is easy, and all answers are already fine. I'll try to gather all the conditions that needed to be true in order for the perpetual motion machine to have been true.



                                          Obviously, the "catch" (what makes the scenario impossible in the real world) is not energy losses not considered, but energy gains not considered. Since our system is an energy cycle, all components must be considered. Thus, the conditions are:



                                           1. The generator only receives kinetic energy produced by the wheels
                                          2. The batteries only receive electrical energy from the generator
                                          3. The motor only receives kinetic energy from the batteries and/or generator
                                          4. The wheels only receive kinetic energy from the motor


                                          If all of these are true, then this is indeed perpetual motion. I guess all possible answers will be instances of one of the above being false, having an unaccountd-for energy source instead.






                                          share|improve this answer
























                                            2












                                            2








                                            2






                                            This is easy, and all answers are already fine. I'll try to gather all the conditions that needed to be true in order for the perpetual motion machine to have been true.



                                            Obviously, the "catch" (what makes the scenario impossible in the real world) is not energy losses not considered, but energy gains not considered. Since our system is an energy cycle, all components must be considered. Thus, the conditions are:



                                             1. The generator only receives kinetic energy produced by the wheels
                                            2. The batteries only receive electrical energy from the generator
                                            3. The motor only receives kinetic energy from the batteries and/or generator
                                            4. The wheels only receive kinetic energy from the motor


                                            If all of these are true, then this is indeed perpetual motion. I guess all possible answers will be instances of one of the above being false, having an unaccountd-for energy source instead.






                                            share|improve this answer












                                            This is easy, and all answers are already fine. I'll try to gather all the conditions that needed to be true in order for the perpetual motion machine to have been true.



                                            Obviously, the "catch" (what makes the scenario impossible in the real world) is not energy losses not considered, but energy gains not considered. Since our system is an energy cycle, all components must be considered. Thus, the conditions are:



                                             1. The generator only receives kinetic energy produced by the wheels
                                            2. The batteries only receive electrical energy from the generator
                                            3. The motor only receives kinetic energy from the batteries and/or generator
                                            4. The wheels only receive kinetic energy from the motor


                                            If all of these are true, then this is indeed perpetual motion. I guess all possible answers will be instances of one of the above being false, having an unaccountd-for energy source instead.







                                            share|improve this answer












                                            share|improve this answer



                                            share|improve this answer










                                            answered Nov 23 '18 at 14:55









                                            George Menoutis

                                            920211




                                            920211























                                                0














                                                It could be a:




                                                Gravity train which is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.







                                                share|improve this answer


























                                                  0














                                                  It could be a:




                                                  Gravity train which is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.







                                                  share|improve this answer
























                                                    0












                                                    0








                                                    0






                                                    It could be a:




                                                    Gravity train which is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.







                                                    share|improve this answer












                                                    It could be a:




                                                    Gravity train which is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.








                                                    share|improve this answer












                                                    share|improve this answer



                                                    share|improve this answer










                                                    answered Nov 23 '18 at 9:21









                                                    rhsquared

                                                    7,35421644




                                                    7,35421644























                                                        0














                                                        A probably very silly solution:




                                                        Nowhere does it say that the generator or the motor is powered by cart batteries. Engineer just attached a generator, that runs on regular fuel, a motor, that is powered by this generator, and batteries, that are charged by the wheels turning. Funny thing is that a similar system already exists. Only it gets powered by external electricity.







                                                        share|improve this answer


























                                                          0














                                                          A probably very silly solution:




                                                          Nowhere does it say that the generator or the motor is powered by cart batteries. Engineer just attached a generator, that runs on regular fuel, a motor, that is powered by this generator, and batteries, that are charged by the wheels turning. Funny thing is that a similar system already exists. Only it gets powered by external electricity.







                                                          share|improve this answer
























                                                            0












                                                            0








                                                            0






                                                            A probably very silly solution:




                                                            Nowhere does it say that the generator or the motor is powered by cart batteries. Engineer just attached a generator, that runs on regular fuel, a motor, that is powered by this generator, and batteries, that are charged by the wheels turning. Funny thing is that a similar system already exists. Only it gets powered by external electricity.







                                                            share|improve this answer












                                                            A probably very silly solution:




                                                            Nowhere does it say that the generator or the motor is powered by cart batteries. Engineer just attached a generator, that runs on regular fuel, a motor, that is powered by this generator, and batteries, that are charged by the wheels turning. Funny thing is that a similar system already exists. Only it gets powered by external electricity.








                                                            share|improve this answer












                                                            share|improve this answer



                                                            share|improve this answer










                                                            answered Nov 23 '18 at 9:29









                                                            Eugene Anisiutkin

                                                            1539




                                                            1539























                                                                0














                                                                Since the cart is controlled remotely, I think there are some limitations:




                                                                • The remote controllable distance is bound to have a limit

                                                                • The source of the remote control signal must somehow be supplied power


                                                                Of course the motor can be set to be infinitely on if there is no need for controlling power or steering. In that case it would probably qualify as perpetual motion.






                                                                share|improve this answer


























                                                                  0














                                                                  Since the cart is controlled remotely, I think there are some limitations:




                                                                  • The remote controllable distance is bound to have a limit

                                                                  • The source of the remote control signal must somehow be supplied power


                                                                  Of course the motor can be set to be infinitely on if there is no need for controlling power or steering. In that case it would probably qualify as perpetual motion.






                                                                  share|improve this answer
























                                                                    0












                                                                    0








                                                                    0






                                                                    Since the cart is controlled remotely, I think there are some limitations:




                                                                    • The remote controllable distance is bound to have a limit

                                                                    • The source of the remote control signal must somehow be supplied power


                                                                    Of course the motor can be set to be infinitely on if there is no need for controlling power or steering. In that case it would probably qualify as perpetual motion.






                                                                    share|improve this answer












                                                                    Since the cart is controlled remotely, I think there are some limitations:




                                                                    • The remote controllable distance is bound to have a limit

                                                                    • The source of the remote control signal must somehow be supplied power


                                                                    Of course the motor can be set to be infinitely on if there is no need for controlling power or steering. In that case it would probably qualify as perpetual motion.







                                                                    share|improve this answer












                                                                    share|improve this answer



                                                                    share|improve this answer










                                                                    answered Nov 23 '18 at 21:20









                                                                    user54180

                                                                    1




                                                                    1























                                                                        0















                                                                        Has the engineer somehow successfully built a perpetual motion
                                                                        machine, or is there some other explanation?




                                                                        The engineer is cheating. He or she is broadcasting the power from the remote control.




                                                                        Wireless power transfer (WPT), wireless power transmission, wireless
                                                                        energy transmission (WET), or electromagnetic power transfer is the
                                                                        transmission of electrical energy without wires as a physical link. In
                                                                        a wireless power transmission system, a transmitter device, driven by
                                                                        electric power from a power source, generates a time-varying
                                                                        electromagnetic field, which transmits power across space to a
                                                                        receiver device, which extracts power from the field and supplies it
                                                                        to an electrical load.



                                                                        https://en.wikipedia.org/wiki/Wireless_power_transfer







                                                                        share|improve this answer


























                                                                          0















                                                                          Has the engineer somehow successfully built a perpetual motion
                                                                          machine, or is there some other explanation?




                                                                          The engineer is cheating. He or she is broadcasting the power from the remote control.




                                                                          Wireless power transfer (WPT), wireless power transmission, wireless
                                                                          energy transmission (WET), or electromagnetic power transfer is the
                                                                          transmission of electrical energy without wires as a physical link. In
                                                                          a wireless power transmission system, a transmitter device, driven by
                                                                          electric power from a power source, generates a time-varying
                                                                          electromagnetic field, which transmits power across space to a
                                                                          receiver device, which extracts power from the field and supplies it
                                                                          to an electrical load.



                                                                          https://en.wikipedia.org/wiki/Wireless_power_transfer







                                                                          share|improve this answer
























                                                                            0












                                                                            0








                                                                            0







                                                                            Has the engineer somehow successfully built a perpetual motion
                                                                            machine, or is there some other explanation?




                                                                            The engineer is cheating. He or she is broadcasting the power from the remote control.




                                                                            Wireless power transfer (WPT), wireless power transmission, wireless
                                                                            energy transmission (WET), or electromagnetic power transfer is the
                                                                            transmission of electrical energy without wires as a physical link. In
                                                                            a wireless power transmission system, a transmitter device, driven by
                                                                            electric power from a power source, generates a time-varying
                                                                            electromagnetic field, which transmits power across space to a
                                                                            receiver device, which extracts power from the field and supplies it
                                                                            to an electrical load.



                                                                            https://en.wikipedia.org/wiki/Wireless_power_transfer







                                                                            share|improve this answer













                                                                            Has the engineer somehow successfully built a perpetual motion
                                                                            machine, or is there some other explanation?




                                                                            The engineer is cheating. He or she is broadcasting the power from the remote control.




                                                                            Wireless power transfer (WPT), wireless power transmission, wireless
                                                                            energy transmission (WET), or electromagnetic power transfer is the
                                                                            transmission of electrical energy without wires as a physical link. In
                                                                            a wireless power transmission system, a transmitter device, driven by
                                                                            electric power from a power source, generates a time-varying
                                                                            electromagnetic field, which transmits power across space to a
                                                                            receiver device, which extracts power from the field and supplies it
                                                                            to an electrical load.



                                                                            https://en.wikipedia.org/wiki/Wireless_power_transfer








                                                                            share|improve this answer












                                                                            share|improve this answer



                                                                            share|improve this answer










                                                                            answered Nov 23 '18 at 22:56









                                                                            chasly from UK

                                                                            2,9651149




                                                                            2,9651149















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