Question

Have you ever noticed that how much electrical energy is consumed by electrical appliances in your home. Make a chart of all of these appliances with their power in kW and an average use on daily, weekly, and monthly basis. Usually the electrical power is written on most of the appliances or on their packing. Calculate the total consumption of electrical energy in kWh in your home for December, 2020. Find the expected electricity bill for this month, if 1 kWh energy costs Rs 10. Which item consumed most energy during the month

Answer 1

A. The expected electricity bill for this month is Rs 18,896.2

B. The item which consumed the most energy during the month is the electric cooker with a total consumption of 1,110Kw/Month

Step-by-step explanation:

Step 1 - Identify electrical appliances

I only have 8 electrical appliances in my home.

1. Electric Cooker. Its power rating 3000 Watts (that is 3Kw/h)
2. Refrigerator. Its power rating is 150 Watts (that is 0.15Kw/h)
3. Waterheater. Its power rating is 4000 Watts (that is 4Kw/h)
4. Electric Iron. Its power rating is 1000 Watts (that is 1Kw/h)
5. Led TV. Its power rating is 235 watts (that is 0.235Kw/h)
6. 13 Energy-saving Light bulbs at 60 watts which is a total of 780 watts (which is 0.78Kw)
7. Electric Standing Fan. Its power rating is 55 watts (that is 0.055Kw)
8. Washing machine. Its power rating 255 watts (that is 0.255Kw)

Step 2 - Assign usage per hour and calculate wattage used /month

1. The Electric Cooker is used an average of 9 hours/day. This is 270hours/month. Total Kw used per month 3Kw * 270hours = 1,110Kw/Month
2. The refrigerator is used 24 hours. That is 0.15Kw *24*30days= 108Kw/Month
3. The water heater is used 1 hour every day. That is 4Kw *30days = 120Kw/Month
4. The electric Iron is used for 20 Minutes every day.That is 1Kw * 0.34hr *30= 10Kw/Month
5. The Led Tv is used for 12hours/day. That is 0.235Kw*12*30=84.6Kw/month
6. The bulbs are used for about 18hours/day. That is 0.78kw*18*30= 421.2Kw/month
7. The electric standing fan is used for about 18 hours/day. That is 0.055kw*18*30=29.7Kw/month
8. The washing machine is used for about 6 hours/week. That is 0.255Kw*4*6=6.12Kw/month

Step 3 - Add up all the Kw used per month and multiply by the cost of 1 Kw

Total Kilowatt Consumed/Month = 1110 +108+120+10+84.6+421.2+29.7+6.12

= 1,889.62Kw/Month

Total cost of energy consumed per month = 1889.62 * Rs 10

= Rs 18,896.2

Cheers!