Q. 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) 5,000
C) 15
D) 150
Explanation
(d) Energy consumed in$\ kWh = \frac{watt \times hour}{1000}$
$\Rightarrow$ For 30 days,$\ P = \frac{10 \times 50 \times 10}{1000} \times 30 = 150kWh$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.