Question

Electric field intensity at points in between and outside two thin separated parallel sheets of infinite dimension with like charges of same surface charge density $(\sigma)$ are ______ and _____ respectively.

• A. $\sigma / \epsilon_{0}, \sigma / \epsilon_{0}$
• B. $0, \sigma / \epsilon_{0}$
• C. $0,0$
• D. $\sigma / \epsilon_{0}, 0$

Answer 1

Answer: (B)

$E_{1}=E_{2}=\frac{\sigma}{2 \epsilon_{0}}$
Between plates $E=E_{1}-E_{2}$
$\Rightarrow E=0$ Outside plates $E=E_{1}+E_{2}$
$\Rightarrow E=\sigma / \epsilon_{0}$