Question

Define the potential difference between two points.

Answer 1

1. Potential difference between any two points In the electric field is defined as the amount of work done in moving a unit positive charge without acceleration from one point to another along any path between the two points.
2. It is denoted by $dV$.

$dV=\frac{dw}{dq}$

3. Or the potential difference between points A and B, is defined as the shift in the potential energy of a charge q, divided by the charge, shifted from A to B.

$V_B-V_A=\frac{U_{B_{}}-U_A}{q}=\frac{W_{AB}}{q}=dV$

4. The SI unit of electrostatic potential difference is volt.

5. Potential difference is said to be one volt if one joule of work is done in moving a charge of one coulomb from one point to another in an electric field.

6. If a positive charge is moved from a point at a higher potential to a point at a lower potential, energy is liberated.