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Q.

A coil having an inductance of 0.5 H carries a current which is uniformly varying from zero to 10 ampere in 2 second. The e.m.f. (in volts) generated in the coil is

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a

10

b

5

c

2.5

d

1.25

answer is C.

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e=Ldidt=0.5×102=2.5V
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