Question

Two large parallel planes charged uniformly with surface charge density $\sigma$ and $-\sigma$ are located as shown in the figure. Which one of the following graphs shows the variation of electric field along a line perpendicular to the planes as one moves from A to B ?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

In the region I and III net electric field is zero.

In the region II net electric field is , $E_{II}=\frac{\sigma }{2{\epsilon }_0}+\frac{\sigma }{2{\epsilon }_0}=\frac{\sigma }{{\epsilon }_0}$ and is uniform.


Hence, option (b) is the correct answer.