kwh numericals for practice

1kwh = 3.6x10^6 j

1kwh or units = nxpxtxdays/1000

numericals to practice

1.convert 2 kwh into joules

2.find no of units consumed if 2 fans of 100 w each used daily for 10 hrs for 30 days.also find monthly bill if each unit is 2 rs

3.find units consumed in 30 days and cost of bill if each unit is 2 rs
when
2 fans of 100 w used daily for 10 hrs
3 tubes of 200 w each used daily for 20 hrs

4.find units consumed in January if each unit is 3 rs
3 bulbs of 60 w each daily for 20 hrs
4 fans of 100 w each daily for 10 hrs
1 tv of 1000 w daily for 2 hrs

5.find amount of bill in March if first 100 units cost 2 rs next 100 3 rs and thereafter each unit 5 rs
if 1 tv  of 1000 w daily for 5hrs
1 fridge of 2000w for  24 hrs
2 fans of 100 w daily for 10 hrs
3 bulbs of 60 w daily for 20 hrs

6.Compute the energy consumption in a system that consumes 190 Watts of power and works for 3 hrs a day.

7.A toy car consumes energy of 500 Watts of power if it works for 2 hrs a day using it. Calculate the energy consumption a day.

8.. A 220 V – 5 A electric lamp is used for 30 minutes. How much energy does it require?

9.A 220 V – 60 W solder is used for 4 minutes. How much energy does it require.

10.The energy used by the iron for 1 minute is 33 kJ, at a voltage of 220 volts. How large q1¹the current is in the iron.

11.Someone watches TV on average 6 hours each day. The TV is connected to a 220 Volt voltage so that the electric current flows through the TV is 0.5 Amperes. If the electric company charges $0.092 per kWh, then the cost of using electric energy for TV for 1 month (30 days) is…

12.In a house there are 4 lamps 20 Watt, 2 lamps 10 Watt, 3 lamps 40 Watt, are used 5 hours every day. If the electric company charge 0.092 per kWh, then the cost of using electric energy during 1 month (30 days) is ….

13.Calculate the electrical energy consumed in Joules if a toaster of 60 W is used for 30 minutes?

14 An electric heater of 1000 W is used for two hours in a day? What is the cost of using it for a month of 28 days, if one unit costs 3.00 rupees?

15.Calculate the electricity bill amount for a month of 30 days, if the following devices are used as specified:
a.two bulbs of 40W for six hours.
b.two tubelights of 50W for eight hours
c.A TV of 120W for six hours.
d.Give the rate of electricity is 2.50 rupees per unit?

16.qqIn a factory four bulbs of 100 W each and five fans of 110 W each operate for 12 hours daily. Calculate the units of electricity consumed? Also find the total expenditure if one unit costs 2.50 rupees?

17.geyser of 2.5kW is used for eight hours daily? Calculate the monthly consumption of electrical energy units. Also calculate the cost of electrical units consumption in a month if rate per unit is 3.50 rupees?

18.find power if 100 watts powers used for 2hrs in both kwh and Joules

19.find power if 2kw power used foe 3 hrs both in kwh and Joules

20.convert 10kwh into Joules

21.conver 36 Joules into kwh

22.Find the energy in kWh consumed in 10 hours by four devices of power 500 W each.