In which unit is voltage measured?

Voltage is measured in volts, which is the standard unit defined in the International System of Units (SI). This measurement represents the potential difference in electric charge between two points in an electrical circuit. One volt is defined as the potential difference that would move one joule of energy per coulomb of charge. Understanding voltage is crucial in the context of electrical circuits as it influences the flow of electric current and plays a significant role in the operation of pacemakers and other medical devices.

The other options represent different electrical measurements: amperes measure electrical current, ohms measure resistance, and watts measure power. Each of these units serves a specific purpose in electrical engineering and physics but does not define voltage itself.