An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10A in opposite direction in 0.5 sec. Self inductance of the coil is

Options

(a) 50 mH
(b) 25 mH
(c) 100 mH
(d) 75 mH

Correct Answer:

25 mH

Explanation:

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