Electrical Engineering MCQ Question with brief explanatory answer and explanation on the statement “SI Unit of Voltage is.” Understand what voltage is in Electrical Engineering and what is its SI unit in this MCQ post.

Also see complete list of Electrical Engineering Units and Quantities MCQ here

SI unit of voltage is:

- volts
- amps
- ohms
- watts

Correct answer: 1. volts

Explanation: The correct answer is “volts.”

Voltage is a physical quantity that measures the electric potential difference between two points in an electric circuit. It is denoted by the symbol “V” and is named after the Italian physicist Alessandro Volta. The SI unit of voltage is the “volt” (V), which is defined as the potential difference across a conductor when a current of one ampere flows through it and produces a power dissipation of one watt.

To understand the other options:

- Amps (amperes): Ampere is the SI unit of electric current, denoted by the symbol “A.” It measures the rate of flow of electric charge. While voltage is related to electric current, it is not the unit used to express voltage.
- Ohms (Ω): Ohm is the SI unit of electrical resistance, denoted by the Greek letter “omega” (Ω). Resistance is a property that opposes the flow of electric current. While resistance and voltage are related concepts, they are not measured using the same unit.
- Watts (W): Watt is the SI unit of power, denoted by the symbol “W.” Power represents the rate at which work is done or energy is transferred. While voltage is involved in the calculation of power (P = V x I, where P is power, V is voltage, and I is current), it is not the unit of voltage itself.