Question

Maximum torque acting on an electric dipole of moment  3×10^-29  Cm in a uniform electric field E is 6 × 10^-25 Nm. Find E.

Answer 1

\[ \overrightarrow{τ} = \overrightarrow{p} × \overrightarrow{E} \]

∴ \[\overrightarrow{E}\] = `τ/p [∵ θ = 90°] =(6xx10^25 Nm)/(3xx 10^-29 Cm) = 2 xx 10^4 NC^-1`