Which quantity is measured in volts?

Which quantity is measured in volts?

• A. Current
• B. Resistance
• C. Voltage
• D. Power

Answer: (C)

Volts measure electric potential difference, which is the energy per unit charge available to push charges through a circuit. One volt equals one joule of energy per coulomb of charge. In practical terms, voltage is what drives current; higher voltage means more potential energy per charge for motion through the circuit. The other quantities use different units: current is measured in amperes, resistance in ohms, and power in watts. So the quantity described by volts is voltage, such as a 9-volt battery providing a 9-volt potential difference.

Volts measure electric potential difference, which is the energy per unit charge available to push charges through a circuit. One volt equals one joule of energy per coulomb of charge. In practical terms, voltage is what drives current; higher voltage means more potential energy per charge for motion through the circuit. The other quantities use different units: current is measured in amperes, resistance in ohms, and power in watts. So the quantity described by volts is voltage, such as a 9-volt battery providing a 9-volt potential difference.