# Resistance

Electrons move more easily through some conductors than others when p.d is applied. The opposition of a conductor to current is called its resistance. A good conductor has a low resistance and a poor conductor has a high resistance.

The resistance of a wire of a certain material depends on its

length, cross- section and the material.

The Ohm

If the current through a conductor is *I* when the voltage across it is *V*, its resistance *R* is defined by

If *V* is in volts and *I* is in amperes, *R* is in Ohms.

The ohm is the resistance of a conductor in which the current is 1 ampere when voltage of 1 volt is applied across it.

Aseem Aggarwal

March 3, 2015@ 3:22 pmlearning about resistance becomes much easier with this!! 🙂