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  4. Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon

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Q. Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon

AIEEEAIEEE 2003Electromagnetic Induction

Solution:

The coupled flux of two coils system is used to define the mutual inductance between the coils. The mutual inductance between the coils is $M_{21}=\frac{N_{2} \phi_{21}}{I_{1}}$ So it is defined as the proportionality between the emf generated in coil 2 due to the current flows in coil 1. Thus It depends on the relative position and orientation of two coils.