If a dipole of dipole moment p¯ is placed in a uniform electric field E→, then torque acting on it is given by

Given: Dipole moment of the dipole =p→ and uniform electric field =E→. We know that dipole moment (p)=q.a (where q is the charge and a is dipole length). And when a dipole of dipole moment p→ is placed in uniform electric field E→, the Torque (t) = Either force x perpendicular distance bet ween the two forces =qa esinθ or τ=pEsinθ or τ→=p→×E→ (vector form)