An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. It its dipole moment is along the direction of the field, the force on it and its potential energy are, respectively.

Options

A. 2qE and minimum
B. qE and pE
C. zero and minimum
D. qE and maximum

Answer

A, D

Explanation

Potential energy , U = -pE cos `theta`
For q = `0^(@)`, U = -pE, which is minimum