Question

A parallel plate capacitor has two square plates with equal and opposite charges. The surface charge densities on the plates are + $\sigma$ and $- \sigma$ respectively. In the region between the plates the magnitude of the electric field is.

• A. $\frac { \sigma } { 2 \varepsilon _ { 0 } }$
• B. $\frac { \sigma } { \varepsilon _ { 0 } }$
• C. 0
• D. None of these

Answer 1

Answer: (B)

$\frac { \sigma } { \varepsilon _ { 0 } }$

Answer 2

: The magnitude of the electric field between the plates is,

$\mathrm { E } = \frac { \sigma } { 2 \varepsilon _ { 0 } } - \left( - \frac { \sigma } { 2 \varepsilon _ { 0 } } \right) = \frac { \sigma } { \varepsilon _ { 0 } }$