There are infinite equipotential lines all parallel to `BC` in a right angled triangular region `ABC` as shown in the figure. All the points on a line have the same potential proportional to the length of the line.
A positive charge is moved from `A` to `B` and `C` separately to do work. `W_(AtoB)` & `W_(AtoC)`, respectively, then

Options

A. `bar(AB)`
B. `bar(BC)`
C. `bar(AC)`
D. will remain at rest.

Explanation

Electric field is parallel to `-bar(AB)`.