Question

How much energy in kilowatt hour is consumed in operating ten 50 watt bulbs for 10 hours per day in a month (30 days)

• A. 1500
• B. 5000
• C. 15
• D. 150

Answer 1

The correct option is D 150

Energy consumed $=10\times 50\times 10\times 30\times 3600J$
$[1Kwh=3600\times 1000J]$
$=\frac{10\times 50\times 10\times 30\times 3600}{3600\times 1000}kWh=150$