maker(Ω)

Resistance

What is resistance?

Resistance is the opposition to the flow of electric current through a material or component, measured in ohms (Ω). It determines how much current will flow for a given voltage according to Ohm's Law (V = I × R). Higher resistance means less current flows, while lower resistance allows more current to pass through. Resistance is a fundamental property used to control current flow, divide voltages, and dissipate power in electronic circuits.

Related Terms

Resistor

A resistor is a passive electronic component that limits or controls the flow of electrical current in a circuit by providing resistance. It converts electrical energy into heat energy according to Ohm's law (V = IR), where voltage equals current times resistance. Resistors are commonly used to reduce current flow, divide voltages, protect sensitive components from excessive current, and set bias points in electronic circuits. They come in various types including fixed-value resistors with color-coded bands and variable resistors like potentiometers.