Question

Q13. An electric bulb draws a current of 0.8A and works on 250V on the average 8 hours a day, if energy costs Rs 3 per kWh. Calculate monthly bill for 30 days.

Answer 1

Using,

P=V x I

=250x0.8=200W=0.2kW

Power consumed in a day=0.2 x 8=1.6kWh

For one month,P=1.6 x30=48kWh

Monthly bill=48x3=Rs 144