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Question

Current in a circuit falls from $5.0 A$ to $0.0 A$ in $0.1 s$ . If an average emf of $200 V$ induced, find an estimate of the self-inductance of the circuit.

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Solution

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The emf is related to inductance by the equation,

$e = L \frac{d i}{d t}$ .

Now, $L = \frac{e}{\frac{d i}{d t}} = \frac{200}{\frac{5}{0.1}} = 4 H$ .

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