Question:

Example 8.14: An electric dipole consists of two opposite charges each of magnitude 1µC separated by 2 cm. The dipole is placed in an external electric field of 10S NC-1. Find: (i) The maximum torque exerted by the field on the dipole (ii) The work the external agent will have to do in turning the dipole through 180° starting from the position 0 = 0°