Question 810: Electrostats & Capacitance

Question

If a unit charge is taken from one point to another point over an equipotential surface, then

Accepted Answer

When a charge is moved from one point to another, the work done by the electric force is given by
$$ W = q \Delta V $$
where:
$$q$$ is the charge,
$$\Delta V$$ is the difference in electric potential between the two points.
On an equipotential surface, all points have the same potential. This means that
$$ \Delta V = 0. $$
Thus, for a unit charge (where $$q = 1$$),
$$ W = 1 	imes 0 = 0. $$
So, no work is required to move a unit charge along an equipotential surface. This corresponds to Option D:
work done to move a charge is zero.

Answer

work is done on the charge.

Answer

work is done by the charge.

Answer

work done on the charge is constantly increasing.

Answer

work done to move a charge is zero.

Electrostats & Capacitance

If a unit charge is taken from one point to another point over an equipotential surface, then

Choose the correct answer: