3 (a) Figure 4 shows the magnetic field produced by a current in a long, straight wire - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Question 3
3 (a) Figure 4 shows the magnetic field produced by a current in a long, straight wire.
Which row of the table is correct when the strength of the magnetic field is... show full transcript
Worked Solution & Example Answer:3 (a) Figure 4 shows the magnetic field produced by a current in a long, straight wire - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Step 1
Which row of the table is correct when the strength of the magnetic field is greatest?
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Answer
The strength of the magnetic field produced by a current decreases as the distance from the wire increases. Therefore, the row with 'small' distance from the wire and 'large' current, which is option A, is correct.
Step 2
Which of these materials would be the most suitable for making a temporary magnet?
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Answer
The most suitable material for making a temporary magnet is B, iron. Iron can be magnetized temporarily, making it a good choice for such applications.
