A charged particle is rotating in a circle. Then, magnetic field ( $\vec{B}$ ) at centre of circle and magnetic moment( $\vec{M})$ produced by motion of changed particle

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are parallel.

are not parallel.

Can't say.

may be parallel.

answer is C.

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Detailed Solution

If the positive charged particle is rotating in a circle in clockwise direction, then equivalent current is in clockwise. Therefore, at centre B and M are both inwards. Hence, they are parallel. But at some other point they may not be parallel.

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