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. $\frac{Q}{A{\epsilon }_0}$
• B. $\frac{Q}{2A{\epsilon }_0}$
• C. $\frac{Q}{4A{\epsilon }_0}$
• D. Zero

Answer 1

Answer: (B)

$E_{\text{net }}=\frac{Q}{4A{\epsilon }_0}\times 2$
$=\frac{Q}{4A{\epsilon }_0}$