Question

Four parallel large plates separated by equal distance $d$ are arranged as shown. The area of the plate is $S$ . Find the potential difference between the plates $B$ and $C$ if the plate $B$ is given charge $Q$ .

• A. $\frac{Q d}{3 \epsilon _{0} S}$
• B. $\frac{2 Q d}{3 \epsilon _{0} S}$
• C. $\frac{Q d}{\epsilon _{0} S}$
• D. $\frac{2 Q d}{\epsilon _{0} S}$

Answer 1

Answer: (A)

Treat parallel plates as capacitor and then make potential difference zero from A to D by assuming some charge on each plate .


$\therefore Potential \, difference \, \frac{Q}{3 C} \, = \, \frac{Q d}{3 \epsilon _{0} S}$