Question

Why do we need potential difference

Answer 1

Potential difference across a circuit is defined as the difference in the net potentials at two points in a circuit.

This Potential difference is necessary to force electron flow through the resistance of a load and conductors. Otherwise no current will flow and no work is done.

The greater the potential difference the greater the electron flow.

The potential difference applied to conductors to induce flow is the “pressure” that forces electrons to drift. Without it, there’s no cause for the electrons to drift in the same direction, so there will be no current.