Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
ELECTRICAL POWER
16 practice questions
Practice questions
1–8 of 8 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the unit used to measure electrical power.
Question 2
1 mark · Easy
Answer and check →Which of the following appliances is designed to use the heating effect of electric current?
- A.Electric kettle
- B.Television
- C.Table fan
- D.Doorbell
Question 3
1 mark · Easy
Answer and see the solution →Describe what is meant by the 'heating effect' of electrical current.
Question 4
3 marks · Easy
Answer and see the solution →A 60 W lamp is switched on for 5 seconds.
(a)[1 mark]State what the lamp’s power rating of 60 W means.
(b)[2 marks]Calculate how much energy is transferred by the lamp in 5 seconds.
Question 5
1 mark · Easy
Answer and see the solution →Give one example of an everyday appliance that uses the heating effect of electric current.
Question 6
2 marks · Easy
Answer and see the solution →An electric heater is labelled 500 W. How much energy does it transfer in 8 seconds?
Question 7
2 marks · Easy
Answer and see the solution →Explain why the wires inside an electric oven are designed to have high resistance.
Question 8
1 mark · Easy
Answer and check →Which statement best describes why a 100 W bulb is brighter than a 40 W bulb?
- A.It transfers more energy every second.
- B.It uses less current.
- C.It is bigger in size.
- D.It has a higher resistance.