First slide

Magnetic flux and induced emf

Question

When a wire loop is rotated in a magnetic field, the direction of induced e.m.f. changes once in each

Moderate

A

$\frac{1}{4}$ revolution
B

$\frac{1}{2}$ revolution
C

1 revolution
D

2 1 revolution

Solution

This is the case of periodic EMI. When a wire loop is rotated in a magnetic field, the direction of induced emf changes for every 1/2 rotation

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