First slide

Inductance

Question

The coefficients of mutual inductance when magnetic flux changes by $2 \times 10^{- 2} Wb$ and current changes by 0.01 A, will be

Easy

A

4 H
B

3 H
C

8 H
D

2 H

Solution

Coefficient of mutual induction of two coils is equal to the number of magnetic flux $(ϕ)$ linkages in one coil when a unit current (i) flows in the other.
Therefore, $M = \frac{ϕ}{i}$
Given, $ϕ = 2 \times 10^{- 2} Wb, i = 0 .01 A$
$M = \frac{2 \times 10^{- 2}}{0 .1} = 2 H$

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