Resistivity is a measure of how strongly a material opposes the flow of electric current. It quantifies the resistance per unit length and cross-sectional area of a material.
Conductivity: The opposite of resistivity, conductivity measures how easily electric current can flow through a material.
Resistance: Resistance is the property that determines how much an object or substance impedes the flow of electric current.
Ohm's Law: Ohm's Law relates voltage, current, and resistance in an electrical circuit and states that V = IR (voltage equals current multiplied by resistance).