Simple Explanation

A rule that shows how voltage, current, and resistance are connected in any electrical circuit.

Concise Technical Definition

A fundamental law of electrical circuits stating that voltage (V) = current (I) × resistance (R), often written as V = IR.

Layman-Friendly Analogy

Like water in a hose: voltage is the pressure, current is the flow, and resistance is the hose’s tightness.

Industry Usage Summary

Used throughout electronics and audio to calculate or troubleshoot relationships between amplifier voltage, speaker impedance (ohms), and current draw. Essential for matching amps and loads.

Engineering Shortcut

V = I × R; solve for volts, current, or resistance in any basic circuit.

Full Technical Explanation

Ohm’s Law defines the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit, expressed as V = IR. It is a foundational principle in electrical engineering and applies to all passive components in linear systems. For audio systems, this law is key in calculating how much current an amplifier will need to produce across a speaker of given impedance (resistance), and how much voltage is required. For example, if a speaker has a resistance of 8 ohms and you want 1 amp of current, you'd need 8 volts. Understanding this helps avoid amplifier overloads, improve efficiency, and ensure safe operation.