Question

Define power and SI unit of power. Calculate the work done by a motor of power 100W, running for 2mins​

Answer 1

Answer:

Power is defined as the rate of doing work or rate of consumption of energy.

Power is calculated by

P= E / t

where E is the energy consumed.

.Unit of energy or work done is Joule (J) and time is SecondSo unit of Power will be

joule / sec

It is given as : SI unit of power is Watt denoted by W.

workdone by motor:-

Power (P) = 100 watt.

Time(t) = 2 minute = 3600 seconds.

∴ Work done by motor = Produced energy

P x t = 100 x 3600 = 360000 Joule.