Electromagnetic effects — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

39 The diagram shows a thermionic diode. Y X Which particles are emitted in the diode, and from where are they emitted? particles from where emitted A electrons X B electrons Y C protons X D protons Y

1 marks

Answer: A

This question in 0654/11 May/June 2007

39 The output from a power station is connected to the transmission cables through a transformer. What is the purpose of the transformer? A to change the frequency of the output B to increase the current C to increase the voltage D to turn the current into alternating current

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2007

38 In order to produce a beam of cathode rays, a heated filament is placed near to an anode in an evacuated glass vessel. evacuated glass vessel anode heated filament What is the type of charge given to the anode and why is this charge chosen? charge reason A negative to attract electrons B negative to repel electrons C positive to attract electrons D positive to repel electrons

1 marks

Answer: C

This question in 0654/11 May/June 2008

35 Microphones and earphones are both used with audio equipment. Which energy change takes place in a microphone and which takes place in an earphone? microphone earphone A electrical to sound electrical to sound B electrical to sound sound to electrical C sound to electrical electrical to sound D sound to electrical sound to electrical

1 marks

Answer: C

This question in 0654/11 May/June 2011

36 The diagram shows the basic structure of a cathode-ray tube in an oscilloscope. hot filament anode X-plates Y-plates – + From which component do the cathode rays start? A the anode B the hot filament C the X-plates D the Y-plates

1 marks

Answer: B

This question in 0654/11 May/June 2011

36 Microphones and earphones are both used with audio equipment. Which energy change takes place in a microphone and which takes place in an earphone? microphone earphone A electrical to sound electrical to sound B electrical to sound sound to electrical C sound to electrical electrical to sound D sound to electrical sound to electrical

1 marks

Answer: C

This question in 0654/12 May/June 2011

40 The diagram shows the basic structure of a cathode-ray tube in an oscilloscope. hot filament anode X-plates Y-plates – + From which component do the cathode rays start? A the anode B the hot filament C the X-plates D the Y-plates

1 marks

Answer: B

This question in 0654/12 May/June 2011

36 Microphones and earphones are both used with audio equipment. Which energy change takes place in a microphone and which takes place in an earphone? microphone earphone A electrical to sound electrical to sound B electrical to sound sound to electrical C sound to electrical electrical to sound D sound to electrical sound to electrical

1 marks

Answer: C

This question in 0654/13 May/June 2011

40 The diagram shows the basic structure of a cathode-ray tube in an oscilloscope. hot filament anode X-plates Y-plates – + From which component do the cathode rays start? A the anode B the hot filament C the X-plates D the Y-plates

1 marks

Answer: B

This question in 0654/13 May/June 2011

36 What are the particles given off by the heated tungsten filament in a thermionic diode? A alpha particles B electrons C neutrons D protons

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2011

39 The diagram represents an electrical energy transmission system. transmission lines power station transformer transformer consumer generator Why are the transformers used? A to decrease the energy loss from the transmission lines B to make the transmission lines safer C to supply the consumer with energy at very high voltage D to transmit the energy from the power station at low voltage

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2011

38 The diagram represents an electrical energy transmission system. transmission lines power station transformer transformer consumer generator Why are the transformers used? A to decrease the energy loss from the transmission lines B to make the transmission lines safer C to supply the consumer with energy at very high voltage D to transmit the energy from the power station at low voltage

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2011

37 What are the particles given off by the heated tungsten filament in a thermionic diode? A alpha particles B electrons C neutrons D protons

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2011

38 An electric current flows along a wire. A magnetic field is at right angles to it (into the page). This causes a force on the wire to the right. magnetic field into the page direction of current direction of force In which direction is the force when the current direction is reversed? A to the right B to the left C upwards D downwards

1 marks

Answer: B

This question in 0654/12 May/June 2012

38 An electric current flows along a wire. A magnetic field is at right angles to it (into the page). This causes a force on the wire to the right. magnetic field into the page direction of current direction of force In which direction is the force when the current direction is reversed? A to the right B to the left C upwards D downwards

1 marks

Answer: B

This question in 0654/13 May/June 2012

39 A wire in a magnetic field carries a current. The wire experiences a force due to the magnetic field. The diagram shows the directions of the magnetic field, the current and the force. magnetic field N S force current The direction of the current and the direction of the magnetic field are both reversed. In which direction does the force act now? A in the opposite direction from before the change B in the same direction as before the change C towards the north pole D towards the south pole

1 marks

Answer: B

This question in 0654/11 May/June 2014

38 A wire in a magnetic field carries a current. The wire experiences a force due to the magnetic field. The diagram shows the directions of the magnetic field, the current and the force. magnetic field N S force current The direction of the current and the direction of the magnetic field are both reversed. In which direction does the force act now? A in the opposite direction from before the change B in the same direction as before the change C towards the north pole D towards the south pole

1 marks

Answer: B

This question in 0654/13 May/June 2014

39 A wire carries an electric current. The wire is placed between the poles of a magnet. This causes a force that pushes the wire upwards. force on wire S N current into page The poles of the magnet and the direction of the current are both reversed. Which arrow now shows the direction of the force on the wire? A N D B S C current out of page

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2014

38 A wire carries an electric current. The wire is placed between the poles of a magnet. This causes a force that pushes the wire upwards. force on wire S N current into page The poles of the magnet and the direction of the current are both reversed. Which arrow now shows the direction of the force on the wire? A N D B S C current out of page

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2014

39 A wire carries an electric current. The wire is placed between the poles of a magnet. This causes a force that pushes the wire upwards. force on wire S N current into page The poles of the magnet and the direction of the current are both reversed. Which arrow now shows the direction of the force on the wire? A N D B S C current out of page

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2014

39 Which device is designed to allow a small direct current (d.c.) to control a large current? A a generator B a motor C a relay D a transformer

1 marks

Answer: C

This question in 0654/11 May/June 2017

39 There is a current in a wire at right angles to a magnetic field. This causes the wire to move upwards. Both the current and magnetic field directions are reversed. In which direction does the wire now move? A downwards B to the left C to the right D upwards

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2018

39 The diagram shows two magnets on an electronic balance. The magnets produce a magnetic field in the direction shown. A wire lies in the magnetic field. The reading on the balance is zero. magnetic field magnet wire magnet A current is produced in the wire and the balance now shows a positive reading. Which change produces a negative reading on the balance? A decreasing the current B increasing the current C reversing the current direction D switching off the current

1 marks

Answer: C

This question in 0654/11 May/June 2019

39 A wire is placed between two magnetic poles. There is a current in the wire in the direction shown. The wire experiences an upward force. force N S current There is also a force on the wire in arrangements X, Y and Z. X Y Z N S S N S N current current current In which of the arrangements is the force upwards? A X only B X and Y only C Z only D X, Y and Z

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2019

39 Which pair of changes must make the coil of an electric motor rotate more quickly? number of current in the coil turns on the coil A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0654/11 May/June 2020

39 The diagram shows a wire in a magnetic field. There is a current in the wire. This causes a force on the wire. current N S wire The current is now doubled and the direction of the magnetic field is reversed. What happens to the force? magnitude of force direction of force A decreases changes B decreases does not change C increases changes D increases does not change

1 marks

Answer: C

This question in 0654/12 May/June 2020

39 The diagram shows a current-carrying wire in a magnetic field. The current and the magnetic field cause a downward force on the wire. current-carrying wire N S direction of force The poles of the magnet are now reversed so that the N-pole is on the right and the S-pole is on the left. What happens to the force on the wire? A Its direction changes. B Its magnitude decreases. C Its magnitude increases. D It is unchanged.

1 marks

Answer: A

This question in 0654/13 May/June 2020

39 A solenoid carrying a current produces a magnetic field. Which diagram shows the magnetic field pattern? A B current current C D current current

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2020

39 A solenoid carrying a current produces a magnetic field. Which diagram shows the magnetic field pattern? A B current current C D current current

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2020

39 The diagram shows a wire in a magnetic field. There is a current in the wire. S N The force produced on the wire causes the wire to move into the page. The direction of the current is now reversed. What happens to the wire? A It does not move at all. B It moves out of the page. C It moves sideways towards one of the poles of the magnet. D It still moves into the page.

1 marks

Answer: B

This question in 0654/12 May/June 2021

39 The diagram shows a wire in a magnetic field. There is a current in the wire. S N The force produced on the wire causes the wire to move into the page. The direction of the current is now reversed. What happens to the wire? A It does not move at all. B It moves out of the page. C It moves sideways towards one of the poles of the magnet. D It still moves into the page.

1 marks

Answer: B

This question in 0654/13 May/June 2021

40 A straight vertical wire passes through the centre of a card. The wire carries a current in the direction shown. current direction card straight wire The current produces a magnetic field around the wire. Which diagram shows the pattern of the magnetic field lines and their direction when seen from above? A B C D wire wire wire wire

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2021

39 There is a current in a coil of wire. The coil rotates between the poles of a magnet. Which change does not increase the turning effect on the coil? A increasing the current in the coil B reversing the current C using a stronger magnet D using more turns in the coil

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2021

39 The diagrams show the cross-section of a straight wire carrying a current into the page. Which diagram shows the pattern and direction of the magnetic field around the wire? A B C D

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2021

39 A straight wire carries a current into the page. Which diagram shows the pattern and direction of the magnetic field around the wire due to the current? A B current current into page into page C D current current into page into page

1 marks

Answer: A

This question in 0654/11 May/June 2023

36 Which material is used for the core of an electromagnet? A aluminium B copper C iron D steel

1 marks

Answer: C

This question in 0654/12 May/June 2023

38 There is a current-carrying wire perpendicular to the page. The direction of the current is into the page. Which diagram shows the pattern and direction of the magnetic field around the wire? A B current current into page into page C D current current into page into page

1 marks

Answer: A

This question in 0654/12 May/June 2023

36 Which material is used for the core of an electromagnet? A aluminium B copper C iron D steel

1 marks

Answer: C

This question in 0654/13 May/June 2023

38 There is a current-carrying wire perpendicular to the page. The direction of the current is into the page. Which diagram shows the pattern and direction of the magnetic field around the wire? A B current current into page into page C D current current into page into page

1 marks

Answer: A

This question in 0654/13 May/June 2023

39 The diagram shows a current-carrying wire placed between the poles of a magnet. The direction of the current is out of the page. The direction of the force on the wire is shown by the arrow. force N S current out of the page Both the direction of the current and the poles of the magnet are now reversed. Which arrow shows the direction of the force on the wire after these changes? A S D B N C current into the page

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2023

38 The diagrams show the cross-section of a straight wire carrying a current into the page. Which diagram shows the pattern and direction of the magnetic field around the wire? A B C D

1 marks

Answer: C

This question in 0654/12 Feb/March 2024

39 A current-carrying wire passes through a flat card. The arrow on the wire shows the direction of the current. Which diagram shows the pattern of the magnetic field on the card and the direction of the magnetic field lines? A B wire wire current current card card C D wire wire current current card card

1 marks

Answer: D

This question in 0654/11 May/June 2024

38 A coil lies between the poles of a magnet. There is a current in the coil and this causes a turning effect. Which change does not increase the turning effect on the coil? A changing the direction of the current B increasing the current C using a stronger magnet D using more turns in the coil

1 marks

Answer: A

This question in 0654/12 May/June 2024

38 A coil lies between the poles of a magnet. There is a current in the coil and this causes a turning effect. Which change does not increase the turning effect on the coil? A changing the direction of the current B increasing the current C using a stronger magnet D using more turns in the coil

1 marks

Answer: A

This question in 0654/13 May/June 2024

38 Which diagram shows the pattern and the direction of the magnetic field around a straight wire that is carrying a current into the page? A B C D

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2024