Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
71–80 of 121 · Easy
Question 71
4 marks · Easy
Answer and see the solution →A desk lamp is powered by batteries providing direct current (d.c.). A television is powered from the mains (a.c.) supply.
(a)[2 marks]State the difference between the current supplied by batteries and the current supplied by the mains.
(b)[2 marks]Explain why a fuse is used in the plug of the television.
Question 72
1 mark · Easy
Answer and see the solution →State what is meant by the term "voltage" in an electric circuit.
Question 73
2 marks · Easy
Answer and see the solution →A current of 2 A flows through a circuit for 10 seconds. Calculate the total charge that passes through the circuit.
Question 74
1 mark · Easy
Answer and check →Which statement correctly describes what happens to the brightness of lamps if more identical lamps are added in parallel to a circuit with one battery?
- A.All lamps become brighter.
- B.All lamps become dimmer.
- C.The brightness stays the same for each lamp.
- D.Only the first lamp lights up.
Question 75
1 mark · Easy
Answer and see the solution →State what kind of charge carriers are responsible for electric current in a metal wire.
Question 76
3 marks · Easy
Answer and see the solution →A circuit is shown below with a 6 V battery and two resistors, R1 = 3 Ω and R2 = 9 Ω, connected in series.
(a)[1 mark]Calculate the total resistance of the circuit.
(b)[1 mark]Calculate the current in the circuit.
(c)[1 mark]Calculate the voltage across resistor R1.
Question 77
2 marks · Easy
Answer and see the solution →Explain why, in a series circuit, if one lamp goes out, all the others go out as well.
Question 78
2 marks · Easy
Answer and see the solution →Describe how you could use an LED to check if there is a current present in a circuit. Include what you would expect to see.
Question 79
2 marks · Easy
Answer and see the solution →An electric kettle has a current of 6.0 A flowing when connected across a 240 V supply. Calculate the resistance of the kettle.
Question 80
1 mark · Easy
Answer and see the solution →State whether each of the following is a conductor or an insulator: aluminum foil, plastic cup.