Question

What cause of resistance in a conductor?

Answer 1

Resistance:

1. Resistance is a measure of an electrical device's ability to obstruct the current flow.
2. Ohm ($\Omega$) is the unit of resistance.

Cause of resistance in a conductor:

1. While drifting free electrons collide with the ions and atoms of the conductor.
2. This collision is the fundamental cause of resistance in a conductor.