MHT CET · Physics · Electromagnetic Induction
Two coils of self-inductance 25 mH and 9 mH are placed close together such that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is
- A 34 mH
- B 16 mH
- C 15 mH
- D 6 mH
Answer & Solution
Correct Answer
(C) 15 mH
Step-by-step Solution
Detailed explanation
If \(\mathrm{L}_1\) and \(\mathrm{L}_2\) are the inductances of the first and second coil respectively, then mutual inductance between the two coils is given by
\(\mathrm{M}=\sqrt{\mathrm{L}_1 \mathrm{~L}_2}=\sqrt{25 \times 9}=15 \mathrm{mH}\)
\(\mathrm{M}=\sqrt{\mathrm{L}_1 \mathrm{~L}_2}=\sqrt{25 \times 9}=15 \mathrm{mH}\)
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