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Solve problem 19 if the planes of the co...

Solve problem `19` if the planes of the coils are perpendicular.

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Let a current `i` flows in the coil of radius `a_(1)`. The magnetic field at the centre of this coil will now be parallel to the plane of the smaller coil and hence no flux will pass through it, so `M = 0`.
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CENGAGE PHYSICS-INDUCTANCE-Exercise 4.1
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  18. Figure. shows two concentric coplanar coils with radii a and b(alt lt...

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