Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Magnetism
72 practice questions
Topics covered
Practice questions
21–30 of 38 · Normal
Question 21
1 mark · Normal
Answer and check →Which arrangement creates the strongest uniform magnetic field between two bar magnets?
- A.Bar magnets arranged with N–S poles directly facing, close together
- B.Bar magnets arranged with N–N poles directly facing, close together
- C.Bar magnets end to end with a large gap
- D.Bar magnets side by side aligned in the same direction
Question 22
3 marks · Normal
Answer and see the solution →Describe how you could use iron filings and two bar magnets to show the difference between the field near the end of a single magnet and the field between two opposing poles. Include the expected patterns.
Question 23
4 marks · Normal
Answer and see the solution →A student wants to demonstrate a uniform magnetic field using two permanent bar magnets in a simple classroom experiment.
(a)[1 mark]State how the bar magnets should be positioned to create a region of uniform magnetic field.
(b)[1 mark]Suggest one way, apart from iron filings, the student could check that the field is uniform.
(c)[2 marks]The student tries to move a small piece of iron slowly through the region between the poles. Predict what will happen to the piece of iron and explain your answer.
Question 24
3 marks · Normal
Answer and see the solution →Explain, with reference to field lines, why the region just outside the gap between two opposite magnet poles is not uniform, even when the gap itself is.
Question 25
3 marks · Normal
Answer and see the solution →A student records the direction a magnetic compass points at different places between two bar magnets with unlike poles facing each other. The compass needle always points straight from one pole to the other across the gap. What does this suggest about the magnetic field in this region? Explain your answer.
Question 26
3 marks · Normal
Answer and see the solution →An iron nail is placed near the north pole of a bar magnet.
(a)[1 mark]State what happens to the iron nail when it is placed near the north pole of the bar magnet.
(b)[2 marks]Explain why the end of the nail nearest the magnet becomes magnetised, and state its polarity.
Question 27
4 marks · Normal
Answer and see the solution →A student holds a steel nail and an iron nail next to a bar magnet for several minutes. The magnet is then removed.
(a)[2 marks]Describe what happens to the magnetism in each nail after the magnet is taken away.
(b)[2 marks]Explain the difference in the behaviour of the iron and steel nails.
Question 28
2 marks · Normal
Answer and see the solution →A company wishes to make temporary electromagnets for use in a factory. They can choose between using iron and steel for the core.
Which material should they choose for the core, and why?
Question 29
3 marks · Normal
Answer and see the solution →Explain why a compass needle placed near a piece of iron that has been magnetised by a bar magnet will point in a particular direction. Refer to induced poles in your answer.
Question 30
1 mark · Normal
Answer and see the solution →Which of the following materials is most suitable for making the core of a temporary electromagnet?
- A.Steel
- B.Cobalt
- C.Iron
- D.Copper