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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 |
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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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