A teacher prepares some equipment to demonstrate electromagnetism - Edexcel - GCSE Physics Combined Science - Question 2 - 2022 - Paper 1
Question 2
A teacher prepares some equipment to demonstrate electromagnetism. Figure 2 shows the equipment.
The teacher wants to show that iron fillings
- are picked up by the... show full transcript
Worked Solution & Example Answer:A teacher prepares some equipment to demonstrate electromagnetism - Edexcel - GCSE Physics Combined Science - Question 2 - 2022 - Paper 1
Step 1
Suggest a suitable metal for the rod.
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Answer
A suitable metal for the rod is soft iron. This is because soft iron can be easily magnetized and demagnetized, making it ideal for demonstration purposes in electromagnetism.
Step 2
State why the strength of the magnetic field shown is not zero.
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Answer
The strength of the magnetic field is not zero because the Earth has a magnetic field, which affects the readings on the phone even when no nearby magnets are present.
Step 3
State two changes in the magnetic field measured by the phone from Figure 3 to Figure 4.
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Answer
The direction of the magnetic field has changed from North to Northeast.
The strength of the magnetic field has increased, changing from 46.67 µT to 63.19 µT.
Step 4
Describe how the student could use the mobile phone to investigate the strength of the magnetic field at different distances from the magnet.
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Answer
The student could investigate the strength of the magnetic field by following these steps:
Use a ruler or tape measure to measure the distance between the phone and the magnet.
Record the strength of the magnetic field at various distances.
Move the phone or magnet to different locations and repeat the measurements.
Process the results by comparing values and drawing diagrams to visualize the findings.
