Question

In the figure, there are four arcs carrying positive and negative charges. All of them have same charge density $\lambda$. Pick incorrect statement(s).

• A. The net dipole moment for the given charge distribution is $\left(4\sqrt{5}\right)\lambda R^2$.
• B. The resultant electric field at the center is zero.
• C. If a uniform $\overrightarrow{E}$ is switched on perpendicular to the plane, charge distribution starts rotating about X-axis.
• D. Potential at the centre of the given charge distribution is non-zero.

Answer 1

Answer: (B), (C), (D)

The correct options are
B The resultant electric field at the center is zero.
C If a uniform $\overrightarrow{E}$ is switched on perpendicular to the plane, charge distribution starts rotating about X-axis.
D Potential at the centre of the given charge distribution is non-zero.