An electric dipole with dipole moment 5 × 10 - 7 C m is in the electric field of 2 × 10 4 N C - 1 at an angle of 60 ° with the direction of the electric field. The torque acting on the dipole is

Question

An electric dipole with dipole moment 5 × 10 - 7 C m is in the electric field of 2 × 10 4 N C - 1 at an angle of 60 ° with the direction of the electric field. The torque acting on the dipole is, 9 × 10 - 3 N m, 1 × 10 - 4 N m, 8 . 66 × 10 - 3 N m, 2 . 88 × 10 - 3 N m

MARKS App · Accepted Answer

The torque is calculated by doing vector product of dipole moment and the electric field. ⇒ τ = P E sin θ ⇒ τ = 5 × 10 - 7 × 2 × 10 4 × 3 2 = 8 . 66 × 10 - 3 N m

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