A generator is constructed by rotating a coil of N turns in a magnetic field B a

Question

A generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency f. The internal resistance of die coil is R and the cross sectional area of the coil is A. The average induced EMF doubles if the magnetic field B is doubled. The maximum induced EMF occurs when the coil is rotated about an axis perpendicular to area A. The average induced EMF doubles if the frequency f is doubled. The average induced EMF doubles if the resistance R is doubled. The average induced EMF doubles if the area A is doubled.

Explanation / Answer

1] True,

EMF = BAw sin theta = BAf*2pi*sin theta

2]False, in that case flux will not change.

3]true, because of above formula

4]False, it has nothing to do with R

5]True,because of above formula

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