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Question

Two coils of self-inductances $$2\ mH$$ and $$8\ mH$$ are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is:


A
10 mH
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B
6 mH
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C
4 mH
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D
16 mH
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Solution

The correct option is C $$4\ mH$$
Mutual inductance M=$$\sqrt{ L_1\times L_2}=\sqrt{ 2\times 8}=4$$mH

Physics
NCERT
Standard XII

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