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Solve the above problem if the planes of...

Solve the above problem if the planes of coils make `theta` angle with each other.

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If i current flows in the larger coil, magnetic field produced at the centre will be perpendicular to the plane of larger coil. Now the area vector of smaller coil which is perpendicular to the plane of smaller coil will make an angle `theta` with the magnetic field.
Thus flux `=vecB,.vecA=(mu_(0)i)/(2a_(2)).pia_(1)^(2)costheta`
or `M=(mu_(0)pia_(1)^(2)costheta_(1))/(2a_(2))`
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