Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Magnetism and Electromagnetism
293 practice questions
Topics covered
Practice questions
141–150 of 293
Question 141
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 142
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
Question 143
3 marks · Normal
Answer and see the solution →Describe an experiment you could carry out to demonstrate that magnetism can be induced in a piece of iron. Include the apparatus you would use, the method, and the expected result.
Question 144
4 marks · Normal
Answer and see the solution →Figure 1 shows a bar magnet and two identical iron nails hanging from it as in an experiment.
Figure 1: Bar magnet and two hanging iron nails (a)[2 marks]Explain why nail 1 is able to hang from the bar magnet.
(b)[2 marks]Explain why nail 2 is able to hang from nail 1.
Question 145
2 marks · Normal
Answer and see the solution →Give two ways to show that a material is magnetically soft.
Question 146
4 marks · Easy
Answer and see the solution →(a)Iron nails are placed near a bar magnet on a sheet of paper. The teacher sprinkles iron filings around the bar magnet and taps the paper gently. Describe what pattern would be formed by the iron filings, and what this shows about the magnetic field.
(i)[1 mark]State what happens to the iron nails near the magnet.
(ii)[1 mark]Explain why the iron filings make lines and the shape of these lines.
(b)[2 marks]The teacher removes the bar magnet and the iron filings are brushed away. At the same spot, the teacher places a steel nail instead of an iron nail. What difference would you expect in how long the nail remains magnetised after the magnet is removed? Explain your answer.
Question 147
4 marks · Easy
Answer and see the solution →(a)[2 marks]List two materials that magnets can attract and two materials they cannot attract.
(b)[2 marks]Explain, using the idea of magnetic materials, why magnets attract some objects but not others. Give an example of a practical use of this property.
Question 148
5 marks · Normal
Answer and see the solution →An iron nail and a steel nail are both placed in contact with the end of a bar magnet.
(a)[2 marks]State what will happen to each nail while the bar magnet is present.
(b)[2 marks]Describe what happens to the magnetism in each nail after the bar magnet is removed.
(c)[1 mark]Explain the difference in behaviour between the iron nail and the steel nail using the ideas of magnetically soft and hard materials.
Question 149
4 marks · Normal
Answer and see the solution →A student places two identical bar magnets flat on a table, their north poles facing each other about 5 cm apart.
(a)[2 marks]State and explain what the student will observe when trying to push the magnets closer together.
(b)[2 marks]Draw a labelled diagram to show the magnetic field pattern between the magnets.
Question 150
4 marks · Normal
Answer and see the solution →A bar magnet is placed under a piece of paper. A student sprinkles iron filings above and observes the pattern formed.
(a)[2 marks]Describe what the pattern of iron filings reveals about the shape and strength of the magnetic field around the bar magnet.
(b)[2 marks]The student now arranges two bar magnets 3 cm apart so their opposite poles face each other.
Explain how the iron filings' pattern will be different in the space between the magnets. What does this show?