An electric dipole with P=10D is placed in a uniform electric field of magnitude, E=10NC- 1 . The angle between them is 180° . Find the torque experienced by the dipole.

Question

An electric dipole with P=10D is placed in a uniform electric field of magnitude, E=10NC- 1 . The angle between them is 180° . Find the torque experienced by the dipole. (A) 102 Nm (B) 10- 2 Nm (C) Zero (D) 103 Nm

Tardigrade Admin · Accepted Answer

The force on the dipole is negative direction of z -axis, so θ =1800 ∴ Torque on dipole, τ=PEsin 1800 = 0

Q. An electric dipole with $P = 10 D$ is placed in a uniform electric field of magnitude, $E = 10 N C^{- 1}$ . The angle between them is $18 0^{\circ}$ . Find the torque experienced by the dipole.

$1 0^{2} N m$

$1 0^{- 2} N m$

Zero

$1 0^{3} N m$

The force on the dipole is negative direction of $z$ -axis, so $θ = 18 0^{0}$
$∴$ Torque on dipole, $τ = PE s in 18 0^{0} = 0$

Q. An electric dipole with P=10D is placed in a uniform electric field of magnitude, E=10NC−1 . The angle between them is 180∘ . Find the torque experienced by the dipole.

102Nm

10−2Nm