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  4. A dipole of dipole moment p is placed in uniform electric field E then torque acting on it is given by

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Q. A dipole of dipole moment $ \overrightarrow{ p} $ is placed in uniform electric field $ \overrightarrow{ E}$ then torque acting on it is given by

AIPMTAIPMT 2001Electrostatic Potential and Capacitance

Solution:

When an electric dipole is placed in a uniform electrical field $ \overrightarrow{E}$, the torque on the dipole is given by $ \overrightarrow{\tau} = \overrightarrow{p} \times \overrightarrow{E}$