What is electric potential difference?
Quick Answer
Electric potential difference, or voltage, is the difference in electric energy per unit charge between two points. It is what drives current through a circuit.
The Full Story
Voltage measures how much energy each unit of charge can gain or lose moving between two points. It is measured in volts and is often compared to pressure in a water system, because a higher voltage can push charges more strongly through a circuit. Batteries, generators, and power supplies create potential differences that make electronics work. Voltage is not the same as current: a high voltage source may produce little current if the circuit is incomplete or highly resistant. Understanding voltage is essential for electricity, electronics, and power engineering.
Key Facts
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"The push that makes electrons move"
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