Electromagnetic effects — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

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 0973/11 May/June 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 0973/11 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 0973/12 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 0973/11 Oct/Nov 2020

39 The diagrams each show a wire carrying a current in the direction of the arrow. Which diagram shows the pattern and the direction of the magnetic field around the wire? A B current current C D current current

1 marks

Answer: C

This question in 0973/11 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 0973/12 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 0973/11 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 0973/11 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 0973/12 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 0973/12 May/June 2023

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 0973/12 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 0973/11 Oct/Nov 2024