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Byju's Answer

Standard VII

Physics

Domestic Electric Circuit

Five bulbs of...

Question

Five bulbs of eighty watt each two fans of hundred watt each an electric motor of three kilowatt and a geyser of five kilowatt are used for eight hours per day by a family. Calculate the total energy cosumed in thirty days and the cost of electricity used in one day at the rate of rupees five per unit.

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Solution

Powrr used in one hour,
Bulbs=580=400w
Fans2100=200w
Motor=3kw=3000w
Geyser=5kw=5000w

1 unit=1000whr=1kwhr

Total power used in a hour=400+200+3000+5000
=8600 w
=8.6kwhr
Total energy consumed in day=8.6kw8
=68.8kwhr

Energy cost per day=68.85
=344rs

Energy used in one month=68.830
=2064kwhr

Energy cost for 30 days=34430
=10320rs

tot

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