A coil of radius R carries current i1. A...

A coil of radius R carries current `i_1`. Another concentric coil of radius `r(rlt ltR)` carries current `i_2`. Planes of two coils are mutually perpendicular and both the coil are free to rotate about common diametre. Find maximum kinetic energy of smaller coil when both the coils are released, masses of coils are M and m, respectively.

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The correct Answer is:

`[(mu_(0)pi r^(3)i_(1)i_(2)MR)/(2(MR^(2)+mr^(2)))]`

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