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 the coil is R and the cross-sectional area of the coil is A. the maximum induced EMF occurs when the coil is rotated about an axis perpendicular to area A. the average induced EMF doubles if the resistance R is doubled. the average induced EMF doubles if the area A is doubled. the average induced EMF doubles if the magnetic field B is doubled. the average induced EMF doubles if the frequency f is doubled.

Explanation / Answer

1. true as B vector should be parallel to A vector for maximum flux

2. false as emf doesnot depend on Resistance

3. true as emf is proportional to area

4. true as emf is proportional to magnetic field

5. true as emf is proportional to frequency

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