AP EAMCET20224 Jul 2022Morning ShiftPhysicsElectrostaticsActual
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
Options
- A9 × 10 - 3   N   m
- B1 × 10 - 4   N   m
- C8 . 66 × 10 - 3   N   m
- D2 . 88 × 10 - 3   N   m
Correct answer
C. 8 . 66 × 10 - 3   N   m
Step-by-step solution
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