CAIE IGCSE Physics 4.1.2 Induced Magnetism Questions

Practise assigning induced poles in soft iron near magnets and predicting the resulting motion of wires, pins, bolts or bars.

Exam points

Assign induced N and S poles in soft iron near a permanent magnet, predict motion or deflection of soft-iron objects, and distinguish temporary induced magnetism in soft iron from retained magnetism in steel.

[Maximum number: 4]

Fig. 8.1 shows a coil wound around a steel bar that is initially unmagnetised.
Any appropriate power supply can be connected between the terminals A and B . No other apparatus is available.

Fig. 8.1

Describe
- how the steel bar can be magnetised,
- how the steel bar can then be demagnetised.
magnetised:
demagnetised:

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CAIE IGCSE Physics 4.1.2 Induced Magnetism Questions question 1