Question

5. Define electric dipole moment. Derive an expression for this potential energy of a dipole in
a uniform electric field. Hence discuss the condition of its stable and unstable conditions.​

Answer 1

Answer:

pdhaoge likhoge to bnoge khrab

kheloge kudoge to bnoge nawab....xD

...xD Hope it helps ❤️

Answer 2

Explanation:

The amount of work you would have to do to increase the angle between p and E from 0 to θ would be the integral of this from 0 to θ, which is pE(1−cosθ), and this is the potential energy of the dipole, provided one takes the potential energy to be zero when p and E are parallel.

The potential energy U of an electric dipole in an electric field is conventionally given by

U = - p.E = - p E cos theta

Where p is the electric dipole moment, E is the electric field, and theta the angle between the directions of p and E.

According to this the potential energy is - pE when the dipole is aligned with the field direction, 0 when it is rotated perpendicular to the field and + pE when it's direction is opposite to that of the field. Recall that the potential energy is always considered relative to a reference.