Power is measured in which unit?

Power is measured in which unit?

• A. Watts
• B. Joules
• C. Volts
• D. Amperes

Answer: (A)

Power is the rate at which energy is transferred or used. In electrical systems, the standard unit for this rate is the watt, which measures how much energy is consumed per second. The relationship P = V × I ties power to voltage and current, showing how the flow of electrical energy translates into useful work. A joule is a unit of energy, not rate; a volt is a measure of electrical potential difference, and an ampere is a measure of current. Since watts directly quantify energy per unit time, they are the appropriate unit for power. For example, a device using energy at 100 joules every second has a power of 100 watts.

Power is the rate at which energy is transferred or used. In electrical systems, the standard unit for this rate is the watt, which measures how much energy is consumed per second. The relationship P = V × I ties power to voltage and current, showing how the flow of electrical energy translates into useful work. A joule is a unit of energy, not rate; a volt is a measure of electrical potential difference, and an ampere is a measure of current. Since watts directly quantify energy per unit time, they are the appropriate unit for power. For example, a device using energy at 100 joules every second has a power of 100 watts.