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An electric dipole of moment vecp is pla...

An electric dipole of moment `vecp` is placed normal to the lines of force of electric intensity `vecE`, then the work done in deflecting it through an angle of `180^(@)` is

A

pE

B

`+2pE`

C

`-2pE`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
`theta_1 = 90 , theta_2 = 90 + 180 =270`
`W=int_(theta_1)^(theta_2)pE sin theta=[-pEcos theta]_(90)^(270)=0`
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