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If the current changes from 5A to 3A in 2 seconds and the inductance is 10H, calculate the emf.

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in Basic Electrical Engineering by (88.7k points)
If the current changes from 5A to 3A in 2 seconds and the inductance is 10H, calculate the emf.

(a) 5V

(b) 10V

(c) 15V

(d) 20V

The question was posed to me during an internship interview.

This intriguing question originated from Inductance in Terms of Flux Linkages Per Ampere topic in chapter Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
Correct choice is (b) 10V

To explain I would say: We know that:

emf=L(i2-i1)/t

Substituting the values from the question, we get emf=10V.

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