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An electric dipole of dipole moment 5 × 10-6 Cm is placed in a uniform electric field of 10-2 N/C making an angle of 30° with the direction of the field. The torque exerted by the electric field on the dipole is: |
1 × 10-8 Nm 1.5 × 10-8 N m 2.5 × 10-8 N m 5 × 10-8 N m |
2.5 × 10-8 N m |
Torque $ \tau = pE sin\theta = 5\times 10^{-6} \times 10^{-2} sin30^o = 2.5\times 10^{-8} N-m$ |
