Sample Problem on Unit of Power
Problem 1: Convert 2500 Watts to Kilowatts.
Solution:
We know that, 1 kW = 1000 W
or, 1 W = 0.001 kW
Thus, 2500 W = 2500 x 0.001 kW
⇒ 2500 W = 2.5 kW
Thus, we get 2500 W equal to 2.5 kW.
Problem 2: Convert 3.5 Kilowatts into SI unit of Power.
Solution:
We know that, SI unit of Power is Watt.
Also, 1 kW = 1000 W
⇒ 3.5 kW = 3.5 x 1000 W
⇒ 3.5 kW = 3500 W
Therefore, we get 3.5 kW equal to 3500 W.
Unit of Power – SI Unit
Unit of Power is Watt (J/s). It is named after the scientist James Watt in recognition of his contributions towards developing the steam engine. Power is defined as the rate at which work is done. Hence, the base unit of power is the unit of work divided by the unit of time. Several units used to measure the magnitude of power include Watt, Horsepower (HP), erg/s, BTU/hr etc.
In this article, we will learn the definition of Power, its unit in various systems, conversion between them, some practice problems and frequently asked questions related to the unit of power.