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A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the final value of the current in the circuit.

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A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the final value of the current in the circuit.

(a) 5A

(b) 10A

(c) 15A

(d) 20A

The question was posed to me at a job interview.

The question is from Analysis of Growth & Decay in section Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
Right choice is (a) 5A

The best explanation: The final value of the current in the circuit is:

I=V/R = 5A.

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