Assertion(A): Electric field is always normal to equipotential surfaces and along the direction of decreasing order of potential
Reason(R): Negative gradient of electric potential is electric field.

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false and R is True

Answer

A

Explanation

`vecE=-vecgradV`
So, The electric field is always perpendicular to equipotential surface.
Negative gradient of electric potential is electric field. So, direction of electric field must be in the direction of the decreasing order of electric potential.