Question

If a current of 10 A flows in one second through a coil, and the induced e.m.f. is 10 V, then the self-inductance of the coil is

• A. $\frac{2}{5}H$
• B. $\frac{4}{5}H$
• C. $\frac{5}{4}H$
• D. 1 H

Answer 1

Answer: (D)

1 H

Answer 2

$|e| = L\frac{di}{dt} \Rightarrow 10 = L \times \frac{10}{1} \Rightarrow L = 1H$