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If the current changes from 5A to 3A in x sec and inductance is 10H. The emf is 10V, calculate the value of x.

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If the current changes from 5A to 3A in x sec and inductance is 10H. The emf is 10V, calculate the value of x.

(a) 2s

(b) 3s

(c) 4s

(d) 5s

I got this question in exam.

Question is from Inductance in Terms of Flux Linkages Per Ampere topic in section Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
The correct choice is (a) 2s

To elaborate: We know that:

emf=L(i2-i1)/t

Substituting the values from the question, we get x=2s.

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