Question

if an electric bulb rated as 100 watt, 200 volt is connected to 220 volt sources for 2 hours daily for 10 days, then find out the electrical energy consumed by the bulb. If the use of 1 unit electrical costs Rs. 2/-. Find the cost of electrical energy consumed by the bulb.​

Answer 1

Answer:

Rs 4/-.

Explanation:

Power P = 100 W

V = 220

Time = 2 hrs for 10 days = 2x10 = 20 hrs.

Energy = power x time

100 x 20 => 2000 W = 2 kWh.

1 kWh unit costs Rs 2.

So 2 kWh units costs Rs. 4.