an electric bulb draws a current of 0.8a from 250v mains the bulb is used on an average 8 hrs a day, if energy costs Rs 3 per kwh, calculate monthly bills
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Power = VI = 250 * 0.8 = 200 W = 0.2 kW
Power consumed per day = 0.2kW * 8hr = 1.6 kWh
Power consumed for 30 days = 1.6kW * 30 = 48 kWh
Monthly bill = 3 * 48 = ₹144
Power consumed per day = 0.2kW * 8hr = 1.6 kWh
Power consumed for 30 days = 1.6kW * 30 = 48 kWh
Monthly bill = 3 * 48 = ₹144
Answered by
2
Given: V = 250 V, I = 0.8 A
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
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