Which unit represents electrical power?

Which unit represents electrical power?

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

Answer: (A)

Power in an electrical circuit is the rate at which energy is transferred or consumed, and its unit is the watt. A watt is defined as one joule of energy per second, so it directly measures how quickly a device uses or delivers energy. In circuit terms, electrical power equals voltage times current (P = V × I), which naturally results in watts as the unit. The other units represent different quantities: volt is electric potential difference, ampere is current, and ohm is resistance. For example, a 60-watt bulb uses energy at a rate of 60 joules per second, reflecting the power drawn by the bulb.

Power in an electrical circuit is the rate at which energy is transferred or consumed, and its unit is the watt. A watt is defined as one joule of energy per second, so it directly measures how quickly a device uses or delivers energy. In circuit terms, electrical power equals voltage times current (P = V × I), which naturally results in watts as the unit. The other units represent different quantities: volt is electric potential difference, ampere is current, and ohm is resistance. For example, a 60-watt bulb uses energy at a rate of 60 joules per second, reflecting the power drawn by the bulb.