Question

an electric bulb marked with 100 v , 60w is used for 5 h in a week. what is the cost of electricity if the rate is rs 6 per unir

Answer 1

Hey mate !!

Here's your answer !!

Power = 60 W

Time taken = 5 hours

So Power consumed in one day = 60 * 5 = 300 Wh

Number of days = 7

Therefore total Power = 300 * 7 = 2100 W = 2.1 KW

1 KW = 1 Unit

So 2.1 KW = 2.1 Units

So Cost = 2.1 * 6 =  Rs 12.60

Hope this helps !!

Cheers !!

Answer 2

power of electric bulb = 60W = 0.06kW
time used = 5h
energy = power × time taken
= 0.06kW × 5h
= 0.3 kWh = 0.3 'units'

hope it helps you....

please mark answer as brainlist