What is meant by the term power? Define watt.

Question

What is meant by the term power? Define watt.

Accepted Answer

Power is defined as the ratio of doing work.

Mathematically,

Power P= $\frac{Work \: done}{Time \: taken}$

Or P= $\frac{W}{t}$………… (i)

Since work is a scalar quantity, therefore, power is also a scalar quantity.

Note: Bigger units of power are kilowatt (kW), megawatt (MW), etc.

1 kW=1000W=10^{3}

1MW=1000 000=10^{6}

1 horsepower= 1hp = 746 W