Electrical Resistance

By: Dusty Arlia
Published on November 13, 2011
Updated on Wednesday, July 08, 2015 at 8:01 PM
Total Updates: 5

The unit of measurement for electrical resistance is the ohm. Resistance determines how much current is able to flow through a given material. When a material has little resistance, it is called a conductor. Metals act as good conductors, specifically copper. The atoms in copper are of a certain structure that allows electrons to pass around the atoms with little resistance. In non-conductors or poor conductors the atoms are structured in a way that impedes the travel of electrons.

In electricity's water analogy, resistance can be compared to a shut-off valve on a pipe which controls the flow of water. Resistance restricts the flow of electrons through the circuit.