MCQ
A charge $Q$ is uniformly distributed over a large plastic plate. The electric field at a point $P$ close to the centre of the plate is $10 \mathrm{Vm}^{-1}$. If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same charge $Q$ the electric field at the point $P$ will become:
- ✓Zero
- B$5 \mathrm{Vm}^{-1}$
- C$10 \mathrm{Vm}^{-1}$
- D$20 \mathrm{Vm}^{-1}$
