Question

In a house, the following devices of power rating are connected to a potential
difference of 220V.
•Two electric bulbs of 60W each for 4 hours.
• An electric heater of 2.2 kW for 2 hours.
• An electric kettle of 1kWh for 1-hour

i) Calculate the energy consumed in May and if each unit cost is Rs. 5.20/-
ii) Amount of current drawn from the above devices.

Answer 1

Explanation:

load=800 watt.

Running hours per day= 6 hours

Daily consumption= 6 X 800= 4800 watt hour or 4.8 Kwh

Rate per unit= 3 Rs.

Daily Cost = 4.8 X 3= 14.4 Rs.

Monthly Cost= 14.4 X 30 = 432 Rs