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In an RL series circuit, when the switch is closed and the circuit is complete, what is the response?

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In an RL series circuit, when the switch is closed and the circuit is complete, what is the response?

(a) Response does not vary with time

(b) Decays with time

(c) Increases with time

(d) First increases, then decrease

I had been asked this question in exam.

This key question is from Transients in LR Networks topic in chapter Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
Correct choice is (b) Decays with time

The best I can explain: In an RL series circuit, the response decays with time because according to the equation, there is an exponential decrease in the response.

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