What is the SI unit of power?

What is the SI unit of power?

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

Answer: (B)

The SI unit of power is the Watt. Power is defined as the rate at which energy is transferred or converted. In terms of electrical power, it quantifies how much energy is used or produced per unit of time. Specifically, one Watt is equivalent to one Joule per second, which means that if a device uses one Joule of energy in one second, it operates at one Watt of power. Understanding this helps reinforce the relationship between energy, power, and time, making it clear why the Watt is the appropriate unit for measuring power in various contexts, particularly in electrical systems. Other units listed, such as the Joule (which measures energy), Volt (which measures electric potential), and Ohm (which measures resistance), serve different purposes and are not representative of power.

The SI unit of power is the Watt. Power is defined as the rate at which energy is transferred or converted. In terms of electrical power, it quantifies how much energy is used or produced per unit of time. Specifically, one Watt is equivalent to one Joule per second, which means that if a device uses one Joule of energy in one second, it operates at one Watt of power.

Understanding this helps reinforce the relationship between energy, power, and time, making it clear why the Watt is the appropriate unit for measuring power in various contexts, particularly in electrical systems. Other units listed, such as the Joule (which measures energy), Volt (which measures electric potential), and Ohm (which measures resistance), serve different purposes and are not representative of power.