Electrical safety — Paper 2 · IGCSE Science - Combined 0653

39 An 800 W microwave oven and a 2500 W conventional electric oven are both designed to operate from a 230 V supply. Which row shows the rating of the fuse that should be fitted to each device? microwave conventional oven electric oven A 5 A 5 A B 5 A 13 A C 13 A 5 A D 13 A 13 A

1 marks

Answer: B

This question in 0653/21 May/June 2017

39 The device Z in this circuit is designed to cut off the electricity supply automatically if too much current flows. Z What is device Z? A a fuse B a resistor C a switch D an ammeter

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2017

39 The device Z in this circuit is designed to cut off the electricity supply automatically if too much current flows. Z What is device Z? A a fuse B a resistor C a switch D an ammeter

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2017

39 The device Z in this circuit is designed to cut off the electricity supply automatically if too much current flows. Z What is device Z? A a fuse B a resistor C a switch D an ammeter

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2017

39 Why is the electricity supply to a house fitted with a fuse? A to increase the current in the circuit B to increase the resistance of the circuit C to maintain a constant current in the circuit D to prevent overheating of the cables in the circuit

1 marks

Answer: D

This question in 0653/22 Feb/March 2018

40 An electric kettle has the following label attached to its base. current: 7.5 A frequency: 50 Hz power: 1800 W voltage: 240 V How is an appropriate fuse for the kettle labelled? A 10 A B 60 Hz C 2000 W D 300 V

1 marks

Answer: A

This question in 0653/21 May/June 2018

39 A lamp can be dimmed or switched off. Its circuit is protected by a fuse. Which diagram shows this circuit? A B C D

1 marks

Answer: A

This question in 0653/22 May/June 2018

39 A kettle is connected to a power supply as shown. X power kettle supply If too much current flows, a component connected at X automatically disconnects the power supply. Which symbol represents the component at X? A B C D

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2018

40 A mains circuit can safely supply a current of up to 40 A. The current in a hairdryer is 2 A when it is operating normally. The hairdryer is connected to the mains by a lead which can safely carry up to 5 A. What is the correct fuse to protect the hairdryer? A 1 A fuse B 3 A fuse C 10 A fuse D 50 A fuse

1 marks

Answer: B

This question in 0653/21 May/June 2019

40 A mains circuit can safely supply a current of up to 40 A. The current in a hairdryer is 2 A when it is operating normally. The hairdryer is connected to the mains by a lead which can safely carry up to 5 A. What is the correct fuse to protect the hairdryer? A 1 A fuse B 3 A fuse C 10 A fuse D 50 A fuse

1 marks

Answer: B

This question in 0653/22 May/June 2019

40 A mains circuit can safely supply a current of up to 40 A. The current in a hairdryer is 2 A when it is operating normally. The hairdryer is connected to the mains by a lead which can safely carry up to 5 A. What is the correct fuse to protect the hairdryer? A 1 A fuse B 3 A fuse C 10 A fuse D 50 A fuse

1 marks

Answer: B

This question in 0653/23 May/June 2019

40 The charger for a laptop computer is connected by a cable to the mains supply through a plug. The plug contains a 13 A fuse. The cable is designed to carry a current of 2 A. A fault develops and the current in the cable increases to 5 A. laptop plug computer connecting cable What is a possible danger caused by this larger current? A A large amount of electrical energy is wasted. B Somebody receives an electric shock. C The fuse blows and starts a fire. D The cable overheats and starts a fire.

1 marks

Answer: D

This question in 0653/21 May/June 2020

40 The charger for a laptop computer is connected by a cable to the mains supply through a plug. The plug contains a 13 A fuse. The cable is designed to carry a current of 2 A. A fault develops and the current in the cable increases to 5 A. laptop plug computer connecting cable What is a possible danger caused by this larger current? A A large amount of electrical energy is wasted. B Somebody receives an electric shock. C The fuse blows and starts a fire. D The cable overheats and starts a fire.

1 marks

Answer: D

This question in 0653/22 May/June 2020

40 What is the purpose of a fuse in an electrical appliance? A to maintain the correct current in the appliance B to maintain the correct voltage across the appliance C to prevent the insulation around the cables from becoming too thin D to protect the wires from overheating when the current is too large

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2020

40 An air conditioner and a television are both connected to the same electrical circuit. X power air television supply conditioner The current in the air conditioner is 9.0 A and the current in the television is 2.0 A. Several different fuses are available. Which fuse should be connected at X? A 1 A B 3 A C 7 A D 13 A

1 marks

Answer: D

This question in 0653/21 May/June 2021

40 An air conditioner and a television are both connected to the same electrical circuit. X power air television supply conditioner The current in the air conditioner is 9.0 A and the current in the television is 2.0 A. Several different fuses are available. Which fuse should be connected at X? A 1 A B 3 A C 7 A D 13 A

1 marks

Answer: D

This question in 0653/22 May/June 2021

40 An air conditioner and a television are both connected to the same electrical circuit. X power air television supply conditioner The current in the air conditioner is 9.0 A and the current in the television is 2.0 A. Several different fuses are available. Which fuse should be connected at X? A 1 A B 3 A C 7 A D 13 A

1 marks

Answer: D

This question in 0653/23 May/June 2021

40 What is the purpose of a fuse in an electric circuit? A It acts as an extra resistor in the circuit. B It keeps the current at a steady value. C It keeps the voltage at a steady value. D It protects the circuit from a current that is too large.

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2021

40 The diagram shows a circuit with four labelled components. One component breaks the circuit automatically when the current becomes too large. Which component does this? A D B C

1 marks

Answer: B

This question in 0653/22 Oct/Nov 2021

40 What is the purpose of a fuse in an electric circuit? A to disconnect the circuit if the current becomes too large B to increase the voltage if the current becomes too small C to prevent someone cutting the insulation of the wiring D to stop water getting into the circuit

1 marks

Answer: A

This question in 0653/23 May/June 2022

40 Why is the electricity supply to a mains circuit fitted with a fuse? A to increase the current in the circuit B to increase the resistance of the circuit C to maintain a constant current in the circuit D to prevent overheating of the cables in the circuit

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2022

40 Why is the electricity supply to a mains circuit fitted with a fuse? A to increase the current in the circuit B to increase the resistance of the circuit C to maintain a constant current in the circuit D to prevent overheating of the cables in the circuit

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2022

40 When a computer is switched on, the current increases quickly to 3.1 A and then decreases slowly to a steady value of 1.0 A when the computer is in use. The cable connecting the computer to the power supply can safely carry a current of 10.0 A. The circuit contains a fuse. Which fuse rating is used to provide suitable protection? A 1 A B 3 A C 5 A D 13 A

1 marks

Answer: C

This question in 0653/22 Feb/March 2023

40 An electrical appliance with a resistance of 600  is connected to a 240 V supply. Which fuse rating is appropriate to protect the appliance and the wires from overheating if a fault occurs? A 0.04 A B 0.5 A C 5 A D 13 A

1 marks

Answer: B

This question in 0653/22 May/June 2023

40 An electric heater has a label stating this information: 240 V, 2400 W, 10 A. What is written on a fuse with a rating that is appropriate for use with this heater? A 5 A B 13 A C 230 V D 250 V

1 marks

Answer: B

This question in 0653/23 May/June 2023

37 Which list contains a material that prevents electrical charge from flowing through it? A aluminium, copper, mercury B brass, nickel, steel C glass, gold, zinc D silver, iron, lead

1 marks

Answer: C

This question in 0653/21 May/June 2024

40 A fault develops in an electric circuit and the current in the circuit becomes too large. A component in the circuit protects the wires from overheating. Which component protects the wires? A ammeter B fuse C lamp D voltmeter

1 marks

Answer: B

This question in 0653/22 May/June 2024

39 What is the purpose of a fuse in an electric circuit? A It acts as an extra resistor in the circuit. B It keeps the current at a steady value. C It keeps the voltage at a steady value. D It protects the circuit from a current that is too large.

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2025

39 Electrical component Z is designed to break the circuit and stop the current when the current in an electrical circuit becomes too large. What is component Z? A fuse B motor C resistor D voltmeter

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2025