Q.

The coefficients of mutual inductance when magnetic flux changes by 2×10−2 Wb and current changes by 0.01 A, will be

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a

4 H

b

3 H

c

8 H

d

2 H

answer is D.

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Detailed 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=ϕiGiven, ϕ = 2 × 10−2 Wb, i=0.01 AM=2×10−20.1=2 H
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The coefficients of mutual inductance when magnetic flux changes by 2×10−2 Wb and current changes by 0.01 A, will be