The dipole moment of a dipole in an uniform external field vecE is vecP . Then, the torque (τ ) acting on the dipole is

Question

The dipole moment of a dipole in an uniform external field vecE is vecP . Then, the torque (τ ) acting on the dipole is (A)  vecτ = vecP× vecE  (B)  vecτ = vecP. vecE  (C)  vecτ =2( vecP+ vecE)  (D)  vecτ =( vecP+ vecE)

Tardigrade Admin · Accepted Answer

Torque (τ) acting on the dipole in an uniform external field E τ= either force × perpendicular distance =q E × 2 a sin θ =(q × 2 a) × E sin θ =P E sin θ or τ=P × E

Q. The dipole moment of a dipole in an uniform external field $E$ is $P$ . Then, the torque $(τ)$ acting on the dipole is

$τ = P \times E$

$τ = P . E$

$τ = 2 (P + E)$

$τ = (P + E)$

Torque $(τ)$ acting on the dipole in an uniform external field $E$
$τ =$ either force $\times$ perpendicular distance
$= qE \times 2 a sin θ$
$= (q \times 2 a) \times E sin θ$
$= PE sin θ$
or $τ = P \times E$

Q. The dipole moment of a dipole in an uniform external field E is P . Then, the torque (τ) acting on the dipole is

τ=P×E

τ=P.E

τ=2(P+E)

τ=(P+E)