Question

A 500W. BULB BURNS FOR 4 HOURS EVERYDAY . CALCULATE THE UNITS OF ELECTRICAL ENERGY ONSUMED BY THE BULB IN A DAY AND FOR 30 DAYS​

Answer 1

Power of bulb = 100 W

Since it works for 4 hours per day so total power = 100 x 4 = 400 W

Each day , 400 W x 1 of energy is consumed

For 15 days , 400 x 15 = 6000 W-h energy is consumed.

6000 W-h = 6 Kwh = 6 units.