Which of the following in NOT a unit of power?

Correct option is A

Sol: The correct answer is (a) Kilowatt Hour

Key Points:

​Kilowatt hour is NOT a unit of power; it measures energy

kilowatt hour is crucial for understanding energy consumption and efficiency, it is not a unit of power. Instead, it tells us how much energy has been used over time. This distinction is essential for accurately interpreting bills and understanding electrical usage

Information booster:

Kilowatt Hour (kWh)

• Unit of Energy, Not Power: A kilowatt hour (kWh) measures energy consumption. It represents the amount of energy used when 1 kilowatt (kW) of power is used for 1 hour. It is commonly used by electric utilities to bill customers.

• Conversion: 1 kWh = 1,000 watt-hours = 3.6 million joules.

Watt (W)

• Unit of Power: The watt (W) is the SI unit of power. It measures the rate at which energy is transferred or converted.

• Definition: 1 watt equals 1 joule per second (J/s).

Joule/Second (J/s)

• Equivalent to Watt: Joule/second (J/s) is another way to express the watt. Since 1 watt is defined as 1 joule per second, they are directly interchangeable.

• Usage: Used in physics and engineering to describe the rate of energy transfer.

Horsepower (hp)

• Unit of Power: Horsepower (hp) is a unit of power used primarily to describe the output of engines and motors.

• Conversion: 1 horsepower = 745.7 watts (in the British system) or 735.5 watts (in the metric system).