Voltage and current expression for the above circuit are given at t ≥ 0 as V = 125e^-50tV, i = 5e^-50t A. The value of L will be

Question

Question

This question was previously asked in

ESE Electronics 2010 Paper 1: Official Paper

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Answer 1

Concept:

The time constant for any RL circuit is defined as

Calculation:

Given

V = 125 e^-50t V

i = 5 e^-50t A

Since

Comparing V(t) = 125 e^-50t with standard V(t) = V₀ e^-t/τ

Since

Important Points

The time constant for RC circuit is defined as

τ = RC