The expression for torque '$\vec{\tau}$' experienced by an electric dipole of dipole moment '$\vec{P}$' in an external uniform electric field '$\vec{E}$' is given by:

$\vec{\tau}=\vec{P} . \vec{E}$ $\vec{\tau}=\frac{\vec{P}}{\vec{E}}$ $\vec{\tau}=\frac{\vec{E}}{\vec{P}}$ $\vec{\tau}=\vec{P} \times \vec{E}$

$\vec{\tau}=\vec{P} \times \vec{E}$

The correct answer is Option (4) → $\vec{\tau}=\vec{P} \times \vec{E}$