Class test 10

 

Class 10 Physics – Electricity

HOTS Questions – Without Answers

1. A 1.5 kW electric heater is used for 4 hours daily. If electricity costs ₹7 per unit, calculate the electrical energy consumed and the cost of electricity for 30 days.

2. A family uses a 1000 W electric heater for 3 hours and a 200 W fan for 8 hours every day. Calculate the total electrical energy consumed in one day and the electricity bill for 30 days at ₹7 per unit.

3. An electric iron rated 220 V, 1100 W is used for 2 hours daily. Calculate the current drawn by the iron and the electrical energy consumed in 15 days.

4. Two appliances rated 1000 W and 500 W are connected to the same household supply. The first is used for 2 hours and the second for 6 hours daily. Which appliance consumes more electrical energy in a week? Calculate the difference.

5. A 2 kW heater and a 60 W fan are used simultaneously for 3 hours. If the cost of electricity is ₹8 per unit, calculate the total cost of electricity. What would happen to the cost if the heater were used for only 2 hours?

6. An electrical appliance consumes 4.5 units of electricity in 3 hours. Calculate its power rating in watts. If it is used for 5 hours daily, calculate its energy consumption in 10 days.