Two coils of self inductances 9 mH and 4 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 :-

Question

Two coils of self inductances 9 mH and 4 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 (B) 6 mH (C) 4 mH (D) 16 mH

Tardigrade Admin · Accepted Answer

M = K √ L 1 L 2 ⇒ M =√9 × 4=6 mH K =1 for complete linkage

Q. Two coils of self inductances $9 m H$ and $4 m H$ 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 :-

10 mH

6 mH

4 mH

16 mH

$M = K L_{1} L_{2}$
$\Rightarrow M = 9 \times 4 = 6 m H$
${K = 1$ for complete linkage $}$

Q. Two coils of self inductances 9mH and 4mH 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 :-