What is the unit of measure for voltage?

What is the unit of measure for voltage?

• A. Ampere
• B. Watt
• C. Volt
• D. Ohm

Answer: (C)

Voltage is the electrical potential difference that pushes current through a circuit. The unit for this potential is the volt (symbol V). A volt can be thought of as the energy per unit charge available to move charges; according to Ohm’s law, V = I × R, so one volt is the potential difference that would drive one ampere of current through a one-ohm resistor. This distinguishes voltage from current (measured in amperes), resistance (measured in ohms), and power (measured in watts). A voltmeter or a digital multimeter measures voltage. For context, household mains voltage is commonly about 120 V or 230 V depending on the country.

Voltage is the electrical potential difference that pushes current through a circuit. The unit for this potential is the volt (symbol V). A volt can be thought of as the energy per unit charge available to move charges; according to Ohm’s law, V = I × R, so one volt is the potential difference that would drive one ampere of current through a one-ohm resistor. This distinguishes voltage from current (measured in amperes), resistance (measured in ohms), and power (measured in watts). A voltmeter or a digital multimeter measures voltage. For context, household mains voltage is commonly about 120 V or 230 V depending on the country.