voltage
An electromotive force or potential difference expressed in volts, representing the pressure that pushes electricity through a circuit.
Voltage is not the electricity itself, but rather the potential energy difference per unit charge that drives the current. Think of it as water pressure in a pipe.
Word relationships
- potential difference: Potential difference is the formal scientific term for the difference in electrical charge between two points, while voltage is the practical term measured in volts.
Commonly confused with
- amperage: Voltage is the electrical pressure pushing the charge, whereas amperage (current) is the actual rate of flow of that charge.
Word family
- volt (noun): The SI unit of electromotive force.
Collocations
- high voltage
- low voltage
- voltage drop
- voltage regulator
Example sentences
- "This equipment operates at a high voltage and should only be serviced by qualified personnel." A warning label on industrial machinery.
- "The voltage of a single cell depends on the chemical reactions that take place within it." An explanation of battery chemistry and potential.
Memory hook
Think of 'volt' as 'electrical jolt'—it is the force or pressure that pushes the electricity forward. Voltage is the electrical pressure, like water in a hose.
When not to use
Do not use voltage when you mean 'current' (the actual flow of electrons) or 'power' (the total energy delivered per second).
Fun facts
- Electric eels can generate a discharge of up to 860 volts to stun prey and defend themselves.
Related words
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