Question

A current of $2A$ is passed through a coil of $1000$ turns to produce a flux of $0.5\mu Wb$. Self inductance of the coil

• A. $2.5\times {10}^{-4}H$
• B. $2.5\times {10}^{-5}H$
• C. $2.5\times {10}^{-6}H$
• D. $2.5\times {10}^{-7}H$

Answer 1

The correct option is A $2.5\times {10}^{-4}H$

$N\varphi =Li$
$L=\frac{N\varphi }{L}$
= $\frac{1000\times 0.5\times {10}^{-6}}{2}$
$=2.5\times {10}^{-4}H$