MCQ
A large nonconducting sheet $M$ is given a uniform charge density. Two uncharged small metal rods $A$ and $B$ are placed near the sheet as shown in figure:
- A$M$ attracts $A.$
- B$M$ attracts $B.$
- C$A$ attracts $B.$
- ✓$B$ attracts $A$.




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$(A)$ $\mathrm{E}=\frac{3}{4}\left(\frac{\mathrm{mv}^{2}}{\mathrm{qa}}\right)$
$(B)$ Rate of work done by the electric field at $\mathrm{P}$ is $\frac{3}{4}\left(\frac{\mathrm{mv}^{3}}{\mathrm{a}}\right)$
$(C)$ Rate of work done by both the fields at $\mathrm{Q}$ is zero
$(D)$ The difference between the magnitude of angular momentum of the particle at $\mathrm{P}$ and $Q$ is $2 mav$.
