Q1- An electric dipole with a dipole moment of 2x10^-29 Cm is positioned in an electric field of 5x10⁵ N/C. If the dipole is perpendicular to the field direction calculate the torque experienced by the dipole.

Q2- Two vertical parallel plate electrodes are placed in a container as a liquid-level detector. The air and liquid in the container form the dielectric between the electrodes. Explain in detail how the measurement of the capacitance of detector can be used to determine the height of liquid in the container. Include a diagram in your answer.

Solution