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Q.

The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 Tesla to 6 Tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is

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a

104V

b

1.2 V

c

1.0 V

d

10-2V

answer is C.

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Detailed Solution

e=−NΔBΔt⋅Acos⁡θ=−100×(6−1)2×40×10−4cos⁡0⇒|e|=1V
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