Physics - EMI/AC Question with Solution | TestHub

Key Idea : Inductance of a coil is numerically equal to the emf induced in the coil when the current in the coil changes at the rate of $1{\mathrm{As}}^{-1}$. If $I$ is the current flowing in the circuit, then flux linked with the circuit is observed to be proportional to $I$, ie, $\begin{array}{rl}& \varphi \propto I\\ & \text{or }\varphi =LI\end{array}$ where $L$ is called the self-inductance or coefficient of self-inductance or simply inductance of the coil. Net flux through solenoid, $\varphi =500\times 4\times 10^{-3}=2\mathrm{Wb}$ or $2=L\times 2$ [after putting values in Eq. or $L=1\mathrm{H}$