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Q.

A varying current at the rate of 3 A/s in a coil generates an e.m.f. of 8 mV in a nearby coil. The mutual inductance of the two coils is

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a

2.66 mH

b

2.66×10−3 mH

c

2.66 H

d

0.266 H

answer is A.

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Detailed Solution

|e| =Mdidt⇒8×10−3=M×3⇒A1=2.66mH
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A varying current at the rate of 3 A/s in a coil generates an e.m.f. of 8 mV in a nearby coil. The mutual inductance of the two coils is