What is the unit for voltage?

What is the unit for voltage?

• A. Volts
• B. Amps
• C. Ohms
• D. Joules

Answer: (A)

Voltage is the electrical potential difference that drives charges through a circuit. The unit for voltage is the volt (V). By definition, one volt equals one joule of energy per coulomb of charge moved. This distinguishes voltage from other quantities: current is measured in amperes, resistance in ohms, and energy in joules. So volts is the correct unit for voltage.

Voltage is the electrical potential difference that drives charges through a circuit. The unit for voltage is the volt (V). By definition, one volt equals one joule of energy per coulomb of charge moved. This distinguishes voltage from other quantities: current is measured in amperes, resistance in ohms, and energy in joules. So volts is the correct unit for voltage.