Question

Each of two large conducting parallel plates has one sided surface area $A$. If one of the plates is given a charge $Q$ whereas the other is neutral, then the electric field at a point in between the plates is given by

• A. $\frac{Q}{A \varepsilon_{0}}$
• B. $\frac{Q}{2 A \varepsilon_{0}}$
• C. $\frac{Q}{4 A \varepsilon_{0}}$
• D. Zero

Answer 1

Answer: (B)

$ E_{\text {net }} =\frac{Q}{4 A \varepsilon_{0}} \times 2 $
$=\frac{Q}{4 A \varepsilon_{0}} $