List of top Physics Questions on Electric Dipole asked in MHT CET

Select the 'WRONG' statement about polar molecules.

Two electric dipoles of moment \(P\) and \(8P\) are placed in opposite directions on a line at a distance of \(24\) cm. The electric field will be zero at the point between the dipoles whose distance from the dipole of moment \(P\) will be \(x_1\). When \(8P\) is replaced by \(27P\) keeping all other quantities the same, the distance \(x_1\) now becomes \(x_2\). The difference \(|x_2-x_1|\) is ( All the distances are measured from the centers of the dipole.)

When a dipole placed parallel to electric field is rotating through \(π^c\), the work done is W. The work done in rotating the dipole through \((\frac{π}{3})^c\) is
(\(cos0^{\circ} = 1\), \(cos60^{\circ} = \frac{1}{2}\), \(cos180^{\circ} = -1\))

An electric dipole of length \(3\text{cm}\) is placed with its axis making an angle of \(60^{\circ}\) with a uniform electric field of \(5\times 10^4\) N/C. It experiences a torque of \(9\sqrt{3}\) Nm. The magnitude of charge on the dipole is \((sin60^{\circ} = \frac{\sqrt{3}}{2})\)

Select the WRONG statement about polar molecules.

An electric dipole of length \(0.5 μ\text{m}\) is placed with its axis making an angle of \(30^{\circ}\) with uniform electric field \(10^4 \text{V/m}\). If it experiences a torque of \(5\times 10^{-9} \text{Nm}\), the magnitude of the charge on the dipole is (\(sin30^{\circ} = 0.5\))

An electric dipole having dipole moment $P = q \times 2\ell$ is placed in a uniform electric field 'E'. The dipole moment is along the direction of the field. The force acting on it and its potential energy are respectively