A dipole of dipole moment p is rotated by angle π in a uniform electric field of strength E. The work required:

Question

A dipole of dipole moment p is rotated by angle π in a uniform electric field of strength E. The work required: (A) must be pE (B) must be 2 p E (C) must be zero (D) may be zero

Tardigrade Admin · Accepted Answer

Work required = change in potential energy =- pE cos (θ+π)-(- pE cos θ)=2 pE cos q

Q. A dipole of dipole moment $p$ is rotated by angle $π$ in a uniform electric field of strength $E$ . The work required:

must be pE

must be 2 p E

must be zero

may be zero

Work required $=$ change in potential energy
$= - pE cos (θ + π) - (- pE cos θ) = 2 pE cos q$

Q. A dipole of dipole moment p is rotated by angle π in a uniform electric field of strength E. The work required: