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An electric dipole is held in a uniform ...

An electric dipole is held in a uniform electric field.
The dipole is aligned parallel to the field.Find the work done is rotating it through the angle of `180^@`.

Text Solution

Verified by Experts

Here `theta_1 = 0^@ and theta_2 = 180^@`
`:.` Work done fore rotation of dipole
`W = pE ( costheta_1 - cos theta_2)`
`= pE [ cos 0^@ - cos 180^@]`
`= + 2pE`.
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