Question

how much electrical energy in kilowatt hour is consumed in operating 10 '50 Watt' bulbs for 10 hours per in in a month in 30 days​

Answer 1

Answer:

THE ENERGY CONSUMED IS

➡ FOR OPERATING TEN 50 W BULB

.

. MEANS 500 W

SO

. ➡ 10 HR. - 1 DAY

. X. - 30 DAY

. X =. 300 HR

THUS. ENERGY CONSUMED = POWER * TIME

➡ 0.5 KW * 300 HR

. 5 / 10 * 300

. 150 KW / HR

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Answer 2

Explanation:

one 50 W bulb for 1 hour = 50 Watt-Hour

10 50 W bulbs for 1 hour = 50*10 = 500 Wh

No. of hours = 10 hours / per day * 30 days = 300 hours  

so, 10 50W bulbs for 10 hours/per day for 30 days = 500 * 300 Wh

1 Kilowatt hour = 1000 watt hour

so energy in KWh = 150 KWh.