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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: Voldemath on February 23, 2016, 06:49:18 pm

Title: Question on Motors and Generators
Post by: Voldemath on February 23, 2016, 06:49:18 pm

With reference to Lenz's law explain why it is harder to turn a generator when it is connected to a load (e.g. a light bulb) than when it is not connected to a load. (3)

Title: Re: Question on Motors and Generators
Post by: Skidous on May 16, 2016, 07:37:08 pm

There is physical resistance with the load attached, thereby making it harder to turn, however the voltage supplied is greater due to the reduced turns and thus causing reduced back emf