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An electric dipole of moment p is placed...

An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes and angle `theta` with direction of the filed. Assuming that the potential energy of the dipole to be zero when `theta = 90^(@)` the torque and the potential energy of the dipole will respectively be

A

`pE sin theta, 2pE cos theta`

B

`pE cos theta, -pE sin theta`

C

`pE sin theta, -pE cos theta`

D

`pE sin theta, -2p E cos theta`

Text Solution

Verified by Experts

The correct Answer is:
C
Toque `tau= PE sin theta` and Potential energy `U=- PE cos theta`
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