Question

Two charges \(+5\,\mu C\) and \(-5\,\mu C\) form an electric dipole of length \(0.2\,m\). The dipole is placed in a uniform electric field of intensity \(20\,V\,m^{-1}\). If the angle between the dipole moment and electric field is \(30^\circ\), find the torque acting on the dipole.

• A. \(1\times10^{-5}\,N\,m\)
• B. \(2\times10^{-5}\,N\,m\)
• C. \(5\times10^{-6}\,N\,m\)
• D. \(1\times10^{-6}\,N\,m\)

Hint:

For an electric dipole in a uniform electric field, \[ \tau=pE\sin\theta. \] Maximum torque occurs when \(\theta=90^\circ\).

Answer 1

The Correct Option is C