Question

Four bulbs with the power of 10 W each, are lit for 30 minutes.calculate the electrical energy consumed by them.​

Answer 1

Power: 10 W

No of bulbs: 4

So, Total power : 10×4 = 40 W

Time for which they are lit= 30 minutes= 30×60= 1800s

So electrical energy consumed = 40×1800

= 72000W/s

Answer 2

Answer:

p=10

bulbs=4

tp=power*consumables

=10*4

=40