Electric Potential & Equipotentials
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Work done by electric field on moving a positive charge on an equipotential surface is always zero.
Reason (R): Electric lines of forces are always perpendicular to equipotential surfaces. In the light of the above statements, choose the most appropriate answer from the options given below:
Show answer and solution
Answer: (a)
- A: on an equipotential surface , so . True.
- R: field lines are normal to equipotentials. True.
- Since is perpendicular to the displacement along the surface, , so R explains A.
- So the answer is (a).