Question

electric bulb draws a current of 0.8A from 250 V mains. The bulb is used on an average 8 hours a
day, If energy costs Rs 3 per kWh, calculate the monthly bill for 30 days.

Answer 1

Dear Student

Using,

P = V x I

= 250 x 0.8 = 200W = 0.2kW

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

For one month,

P=1.6 x 30 = 48kWh

Monthly bill = 48 x 3 = Rs 144

Regards