In a house there are ten 60-watt lamps. ...

In a house there are ten 60-watt lamps. Three 40-watt flourorescent tubes and three 40-watt fans. When all these are switched on what is the current drawn from the mains if the supply voltage is 220V? Calculate the power drawn and the cost for using them for 6hours daily in a month of 30 days.( 1 B.O.T. unit costs 30 pasise).

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3.82A, 840W. Rs45.36

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NN GHOSH-HEATING AND CHEMICAL EFFECT OF CURRENT-EXAMPLE B

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