Q.

A 800 turn coil of effective area 0.05 m2 is kept perpendicular to a magnetic field 5×10–5 T. When the plane of the coil is rotated by 900 around any of its coplanar axis in 0.1s, the emf induced in the coil will be

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a

0.2V

b

2V

c

0.02V

d

2×10–3 V

answer is B.

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Detailed Solution

e=NBAtcosθ1cosθ2=0.02v

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A 800 turn coil of effective area 0.05 m2 is kept perpendicular to a magnetic field 5×10–5 T. When the plane of the coil is rotated by 900 around any of its coplanar axis in 0.1s, the emf induced in the coil will be