Mathematically the mutual inductance may be defined as:
Correct answer: A. Option A
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Mathematically, mutual inductance (M) between two coils can be defined as: M=N2 Φ21/I1 ORM=N1Φ12/I2Where:M is the mutual inductance (in henries, H),N1 and N2 are the number of turns in the coils,Φ21 is the magnetic flux produced by coil 2 and linking coil 1 (in webers, Wb),Φ12 is the magnetic flux produced by coil 1 and linking coil 2 (in webers, Wb),I1 is the current in coil 1 (in amperes, A), andI2 is the current in coil 2 (in amperes, A).This formula quantifies the mutual influence of one coil's magnetic field on the other coil, resulting in the induction of an electromotive force (emf) in the second coil when the current in the first coil changes, and vice versa.
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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