1.

A dipole of dipole moment P is kept at the centre of a ring of radius R and charge Q. If the dipole lies along the axis of the ring. Electric force on the ring due to the dipole is : (K = (1)/(4pi epsilon_(0)))

Answer»

zero
`(KPQ)/(R^(3))`
`(2KPQ)/(R^(3))`
DEPENDS on the distribution of Q on the ring

Answer :B


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