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Power calculations gamma

Last updated 5 months ago

10 questions

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Question 1

1.

A heater has a power rating of 50 watts and runs for 10 seconds. How much energy does it use?

Question 2

2.

A light bulb has a power of 60 watts and is on for 15 seconds. How much energy does it consume?

Question 3

3.

A fan operates with a power of 30 watts for 20 seconds. How much energy does it use?

Question 4

4.

A motor runs at 25 watts for 40 seconds. Calculate the energy used.

Question 5

5.

An electric kettle has a power of 100 watts and runs for 5 seconds. How much energy does it use?

Question 6

6.

A 1.5 kW hair dryer runs for 10 seconds. How much energy does it use? (Hint: 1 kW = 1000 W)

Question 7

7.

A 2 kW washing machine is used for 20 seconds. How much energy does it consume?

Question 8

8.

A 0.8 kW microwave is on for 30 seconds. How much energy does it use?

Question 9

9.

9. A 0.5 kW vacuum cleaner runs for 15 seconds. How much energy does it consume?

A) 500 J

B) 5,000 J

C) 7,500 J

D) 15,000 J

Question 10

10.

10. A 1.2 kW electric drill operates for 25 seconds. How much energy does it use?

A) 3,000 J

B) 12,000 J

C) 24,000 J

D) 30,000 J