Question

Calculate the units of energy consumed by 100 watt electric bulb in 5 hours

Answer 1

Answer:

Given, power of the electric bulb,

P=100W=(100/1000)kW=0.1kW ;

time for which bulb is used, t=5h

As P= tW

or W=Pt

or W=0.1kW×5h=0.5kWh