Question

An equipotential line and a line of force are:

• A. parallel to each other
• B. perpendicular to each other
• C. in any direction
• D. at an angle of ${45}^o$

Answer 1

Answer: (B)

In electrostatics line of force is same as electric field lines.
Equipotential lines.
$\to$ Equipotential lines are always perpendicular to the electric field
$\to$ No work is required in moving a test charge along the equipotential lines as there is no change of potential.