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When the current changes from +2 A to – 2A in 0.05 second, and e.m.f. of 8 V is induced in a coil. The coefficient of self – induction of the coil is (a) 0.2 H (b) 0.4 H (c) 0.8 H (d) 0.1 H

When the current changes from +2 A to – 2A in 0.05 second, and e.m.f. of 8 V is induced in a coil. The coefficient of self – induction of the coil is

(a) 0.2 H

(b) 0.4 H

(c) 0.8 H

(d) 0.1 H

Grade:6

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

(d) e = - ?Ø/?t ? 8 = L x 4/0.05

? L = 8 x 0.05 / 4 = 0.1 H

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