CAIE IGCSE Physics 4.1.2 Induced magnetism
Practise assigning induced poles in soft iron near magnets and predicting the resulting motion of wires, pins, bolts or bars.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- assign induced N and S poles at the ends of a soft-iron bar near a permanent magnet
- predict whether soft-iron wires, pins or bolts move towards a magnet or deflect
4.1.2—Induced magnetism question 1
Fig. 7.1 shows a barrier at the entrance to a car park. The wooden barrier arm has a weight of 60 N which acts through the centre of gravity at the position shown on Fig. 7.1.
Fig. 7.1
Fig. 7.2 shows a coil attached to a power supply placed below the soft iron bar A.
Fig. 7.2
State and explain what happens to the wooden barrier arm when the switch in the coil circuit is closed.
statement
explanation
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