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Q.

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

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a

14revolution

b

12revolution

c

1 revolution

d

2 1 revolution

answer is B.

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Detailed 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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