Define electric resistance of a conductor.

A conductor's electrical resistance can be defined as the fundamental property of any substance that opposes the flow of current through it.

The resistance of a conductor can be changed only if the temperature of the conductor changes. If a low current is passed through the conductor for a short period of time, the temperature of the conductor does not change, and thus the resistance of the conductor remains constant.

When a large amount of current is passed through a conductor for 30 seconds, the temperature of the conductor rises, and the resistance of the conductor rises as well.

A conductor's electrical resistance can be defined as the fundamental property of any substance that opposes the flow of current through it.