Question

A positive point charge is placed at $P$ in front of an earthed metal sheet $S$ . $Q$ and $R$ are two points between $P$ and $S$ as shown in the figure. If the electric field strength at $Q$ and $R$ are respectively $E_{Q}$ , $E_{R}$ and potential at $Q$ and $R$ are respectively $V_{Q}$ , $V_{R}$ . Then

• A. $E_{Q}=E_{R}$
• B. $E_{Q} < E_{R}$
• C. $V_{Q}>V_{R}$
• D. $V_{Q} < V_{R}$

Answer 1

Answer: (C)

As we move away from $P$ towards sheet $S$ spacing between electric lines of force is increasing. $\therefore E_{R} < E_{Q}$
In direction of electric field potential decreases. $\therefore V_{R} \, < \, V_{Q}$