Chapter 51 of 2364 min read
Potential and potential energy of charges and dipoles
Why this is asked: Potential from multiple charges adds as plain signed numbers, not vectors, much simpler than combining fields — and a dipole's potential is exactly zero at every point on its equatorial line, not just far away.
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- •An electric dipole with dipole moment C m is aligned with the direction of a uniform electric field of magnitude N/C. The dipole is then rotated through an angle of with respect to the electric field. The change in the potential energy of the dipole is:
- •Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The potential at any axial point, at 2 m distance from the centre of a dipole of dipole moment of magnitude C m, is V. (Take SI units.) Reason R: , where is the distance of any axial point, situated at 2 m from the centre of the dipole. In the light of the above statements, choose the correct answer from the options given below:
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