Question

An electric dipole of dipole moment p is placed in a uniform electric field the maximum torque experienced by the dipole is:

Answer 1

Explanation:

Torque = PE. Max. torque

Max. torque Experience by dipole when p and E are perpendicular to each other.

Means When sin theta = 90° and 270°.

Between Electric field(E) and dipole moment(p) .

Thank you

Answer 2

Electric dipole moment, p = 4 × 10−9 C m (Given)

Angle made by p with a uniform electric field, θ = 30° (Given)

Electric field, E = 5 × 104 N C−1 (Given)

Torque acting on the dipole is given by the relation,

τ = pE sinθ

= 4 × 10-9 × 5 × 104 × sin 30

= 20 × 10-5 × 1 half

= 10-4 Nm

Therefore, the magnitude of the torque acting on the dipole is 10−4 N m.