An electric dipole is fixed at the origin of coordinates. Its moment is directed in the positive x -direction. A positive charge is moved from the point ( r , 0 ) to the point ( – r , 0 ) by an external agent. In this process, the work done by the agent is -

Question

An electric dipole is fixed at the origin of coordinates. Its moment is directed in the positive x -direction. A positive charge is moved from the point ( r , 0 ) to the point ( – r , 0 ) by an external agent. In this process, the work done by the agent is -, positive and inversely proportional to r, positive and inversely proportional to r 2, negative and inversely proportional to r, negative and inversely proportional to r 2

MARKS App · Accepted Answer

The potential due to the dipole is positive at A ( r , 0 ) and negative at B ( – r , 0 ) . Also this potential is inversely proportional to r 2 . Work is done by agent is also inversely proportional to r 2 W e x t . A → B = q ( V B – V A ) = – v e

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