Question

A 100 watt light bulb is left on for 10 hours what will be the electric city consumed by it if the cost is 5 rs per unit

Answer 1

P=100 watt=100/1,000=0.1Kw

t=10hrs=10*3,600=36,000secs

E=P*t

E=0.1*3,6000

E=3,600Kw/sec

Cost of 1 unit=₹5

Cost of 3600 units=3600*5=₹18,000

So the electricity consumed is 3,600 Kw/sec and total cost is ₹18,000

Hope it helps