First slide

Electric dipole

Question

A dipole of dipole moment 'p' is placed in non-uniform electric field along x-axis. Electric field is increasing at the rate of 1 V /m, then the force on dipole is :

Moderate

A

0
B

2p
C

p/2
D

p

Solution

Force on dipole = $p \frac{dE}{dx} = p (1) = p$

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