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Consider a cube of side 'a' as shown. Ei...

Consider a cube of side 'a' as shown. Eight point charges are placed at the corners. The cube is rotated about the centroidal axis with constant angular velocity `omega` :

A

Net magnetic field at the centre of cube is zero

B

Net magnetic field at the centre of cube is `sqrt((2mu_(0)qomega)/(pia))`

C

Net magnetic field at the centre of cube is `(8)/(3sqrt3)(mu_(0)qomega)/(pia)`

D

if polarity of any four charges are reversed, then magnetic field at the centre of cube will be zero

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The correct Answer is:
c,d
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