Question

An electric dipole with two charges +5uc and -5uc are separated by distance of 10cm is placed in uniform electric field of intensity 200v/m . Calculate the torque acting on dipole if excess of dipole makes an angle 30° with speed.

Answer 1

$$\tau=pE\sin{30}\\\tau=qlE\sin{30}\\\tau=(5\cdot10^{-6})(0.1)(200)\sin{30}=5\cdot10^{-5}\ Nm$$