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Electromagnetic Induction — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction2 Marks
Question
When is the magnetic coupling coefficient of two coils (i) maximum (ii) minimum?
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Answer

The coefficient of magnetic coupling between two coils is
1. maximum when the coils are wound on the same ferrite (iron) core such that the flux linkage is maximum,
2. minimum for air-cored coils with the coil axes perpendicular.

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