Question
Download Solution PDFTwo coils, A and B, are arranged parallel to each other. When the current in coil A increases at the rate of 20 A/s and current in coil B is 5 A/s, the induced emf in coil B is 60 mV. The mutual inductance of the two coils is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- When two coils are arranged in such a way that a change of current in one coil causes an emf to be induced in the other, the coils are said to have mutual inductance.
- The mutual inductance is denoted letter M and measured in Henry.
- Induced emf in coil A due to the change in current in coil B is
- Where, di = change in current, dt = change in time, M = mutual inductance
Calculation:
Given,
From coil B, from the Reciporicity theorem
⇒ 60 = M × 20
⇒ M = 3 mH
Last updated on Jul 7, 2025
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