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प्रश्न
Two coils are placed near each other. When the current in one coil is changed at the rate of 5 A/s, an emf of 2 mV is induced in the other. The mutual inductance of the two coils is ______.
पर्याय
0.4 mH
2.5 mH
10 mH
2.5 H
MCQ
रिकाम्या जागा भरा
उत्तर
Two coils are placed near each other. When the current in one coil is changed at the rate of 5 A/s, an emf of 2 mV is induced in the other. The mutual inductance of the two coils is 0.4 mH.
Explanation:
By Mutual Inductance
`epsilon_2 = -M(dI)/(dt)`
2 × 10−3 = −M(5)
M = −0.4 mH
The negative sign shows that the mutual inductance is opposite to the induced emf.
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