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  4. Current in a circuit falls from 5 A to 0 A in 0.1 s. If an average emf of 200 V is induced, give an estimate of the self-inductance of the circuit

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Q. Current in a circuit falls from $5 \,A$ to $0 \,A$ in $0.1\, s$. If an average $emf$ of $200 \,V$ is induced, give an estimate of the self-inductance of the circuit

Alternating Current

Solution:

$:|\varepsilon|=L \cdot \frac{\Delta I}{\Delta t}$
$200=(L)\left(\frac{5}{0.1}\right) $;
$L=\left(\frac{20}{5}\right)=4 \,H$