A wheel with a certain number of spokes ...

A wheel with a certain number of spokes is rotated in plane normal to earth's magnetic field so the an e.m.f. is induced between the axle and rim of the wheel. Keeping all other things same, number of spokes is changed. How is the e.m.f. affected ?

3 e

`3/2 e`

e/3

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The correct Answer is:

Change in number of pokes does not change the area swept per second so there is no change in the induced e.m.f.

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