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If an electric dipole of moment vecp be ...

If an electric dipole of moment `vecp` be placed along a uniform electric field of intensity `vecE`, the torque acting on the dipole is

A

`vec(tau)=vecpxxvecE`

B

`vec(tau)=vecp.vecE`

C

`vec(tau)=vecp+vecE`

D

`vec(tau)=0`

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