Question

A coil of wire (8.008 cm2 area) can generate a voltage difference when rotated in a magnetic field. If a 716 turn coil is rotated at 503 Hz in a B field of 0 T, what is the maximum voltage created ?

Answer 1

The voltage induced in a coil when the magnetic flux varies with time is given by Faraday's Law of Induction:

$V_{induced}=-\frac{d}{dt}\Phi$

Since the field is always zero (B = 0T), then the magnetic flux on the coil is always 0, then:

$V_{induced}=-\frac{d}{dt}(0)=0$

Therefore, the maximum voltage created is 0.