Question

Q.78
An electric dipole consists of two opposite
charges each of magnitude 1 x 10°C separated
by a distance 2cm. The dipole is placed in an
external field of 10 X 10SN/C. The maximum
torque on the dipole is -
(1) 0.2 x 10-3 N-m (2) 1.0 x 10-3 N-m
(3) 20 x 103 N-m (4) 4 x 10-3 N-m

Answer 1

Answer:

torque max = pE

= q× 2a × E

substitute the numericals in the above formula to get ans