Question

In the given sub circuit, the resistance $R=0.2\, \Omega$. If $\left(V_{A}-V_{B}\right)=0.5\, V ,\, I=0.5\, A$ and $(d I / d t)=8\, A / s$, then find the inductance of the coil.

• A. 0.01 H
• B. 0.02 H
• C. 0.05 H
• D. 0.5 H

Answer 1

Answer: (C)

$V_{A}-V_{B}=V_{L}+V_{R}=\frac{d l}{d t}+I R$
or $0.5=L \times 8+0.5 \times 0.2$
$L=0.05\, H$