An electric dipole is placed at an angle of 60^ with an electric field intensity 10^4 ~N / C . If experiences a torque equal to 4 3 ~N - m . The charge on the dipole, if the dipole length is 1 cm , is

Step-by-step solution

Given, E=10^4 ~N / C , =4 3 ~N - m , =60^ Dipole length, 2 l=1 ~cm =10⁻² ~m We know that, torque on dipole, aligned & & & =p E & & & =2 q l E [ p=2 q l] & & 4 3 & =10⁻² q 10^4 60^ & & 4 3 & =10^2 q 3 2 & & q & =8 10⁻² C =80 10⁻³ C =80 mC aligned