Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt hours.
Given,
Power = 120 watts = 0.12 kW;
Time, t = 4 hr
Hence, the energy consumed by one fan = P × t
= 0.12 × 4
= 0.48 KWh
Hence, the energy consumed by 5 fans,
= 0.48 x 5
=2.4 kWh