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    A torch operates without batteries. when the torch is shaken a strong permanent magnet moves through a copper coil and generates an electric current

    referring to Faradays Law explain
    i) how the current is generated
    ii) how the speed of shaking affects the size of the current

    Any help appreciated and an explanation please
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    (Original post by Freakonomics123)
    A torch operates without batteries. when the torch is shaken a strong permanent magnet moves through a copper coil and generates an electric current

    referring to Faradays Law explain
    i) how the current is generated
    ii) how the speed of shaking affects the size of the current

    Any help appreciated and an explanation please
    Faraday said 2 main things that concern you:

    -The greater the turn of coils the greater the emf induced.

    -The greater the rate of 'flux linkage' the greater the emf produced. Note that, if the flux linkage =0 no emf is induced.
 
 
 
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