Electrical Resistance

Definition

Electrical resistance is the property of a material to oppose the flow of electric current. It is caused by collisions between moving electrons and atoms in the material.

Related terms

Ohm's Law:

States that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance.

Superconductivity: A phenomenon where certain materials exhibit zero electrical resistance at very low temperatures.

Resistivity:

The inherent property of a material that determines its resistance per unit length and cross-sectional area.