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Q.

The magnetic field of 2 x 10-2 tesla acts at right-angles to a coil of area 100 cm2 with 50 turns. The average emf induced in the coil is 0.1 V when it is removed from the field in time t. The value of t is :

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a

0.1 s

b

0.01 s

c

1 s

d

20 s

answer is A.

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Detailed Solution

Total area= 50 X 100 X 0.0001= 0.5Total flux= 10-2 tesla-m20.1= 10-2t t=0.1 s
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