For the situation shown in the figure below ("assume "`r gtgt` length of dipole ) mark out the correct statement (s) -
.

Options

A. Force acting on the dipole is zero.
B. Force acting on the dipole is approximately `pQ//4piepsilon_0r^3` and is acting upward.
C. Torque acting on the dipole is `pQ//4piepsilon_0r^2` in clockwise direction.
D. Torque acting on the dipole is `pQ//4piepsilon_0r^2` in anticlockwise direction.

Answer

B, C

Explanation

b.,c.
The situation is shown in Fig.SAI60.

`vecF_("net")=2Fsinthetauparrow=(PQ)/(4piepsilon_(0)r^(2))`
`vecr=Fcosthetaxx2a` in clokwise direction
`=(PQ)/(4piepsilon_(0)r^(2))`