Question

In a uniform electric field, equipotential surfaces must:

• A. be plane surfaces
• B. be normal to the direction of the field
• C. be placed such that surfaces having equal differences in potential are separated by equal distances
• D. have decreasing potentials in the direction of the field

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A be plane surfaces
B be normal to the direction of the field
C be placed such that surfaces having equal differences in potential are separated by equal distances
D have decreasing potentials in the direction of the field

For Uniform electric field

These lines are equi-potential surface in the direction of y-axis.

a) Equi-potential surface are plane surface.

b) y-axis is perpendicular to direction of $\overrightarrow{E}.$

c) $V=\frac{1}{4\pi {ϵ}_0}\frac{q}{r}$, V is equal to r.

d) $E=-▽V$