1.

In radial magnetic field, the plane of the coil of M.C.G. for any position is alwaysA. perpendicular to the lines of forceB. parallel to the lines of forceC. inclined with `45^@` with lines of forceD. none of these

Answer» Correct Answer - B
In radial magnetic field , plane of the coil is always parallel to magnetic induction.
`therefore theta=0`
Thus , `tau_n= n IAB cos theta= n IAB cos 0`
= n IAB (maximum).


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