Simple Phenomena of Magnetism Quiz
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5 questions, one answer each
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1. Which of the following best describes the difference between a magnetised and an unmagnetised material?
- A. A magnetised material has magnetic poles that can exert forces, whilst an unmagnetised material cannot exert magnetic forces
- B. A magnetised material is made of iron, whilst an unmagnetised material is made of steel
- C. A magnetised material is attracted to magnets, whilst an unmagnetised material is repelled
- D. A magnetised material is permanent, whilst an unmagnetised material is temporary
2. What does induced magnetism refer to?
- A. The permanent alignment of magnetic domains in steel that cannot be reversed
- B. The temporary magnetisation of a material, such as soft iron, when placed in a magnetic field
- C. The repulsive force between two north poles of different magnets
- D. The motion of a compass needle towards the Earth's magnetic north pole
3. A student uses iron filings to plot the magnetic field around a bar magnet. Which statement correctly describes what the iron filings show?
- A. The iron filings align perpendicular to the magnetic field lines
- B. The iron filings align along the magnetic field lines, showing their pattern and direction
- C. The iron filings show the regions where magnetic poles are strongest but not the field direction
- D. The iron filings are only attracted to the north pole of the magnet
4. Two bar magnets are placed with their south poles facing each other. What will happen and why?
- A. They will attract because opposite poles always attract each other
- B. They will repel because like poles repel each other
- C. They will neither attract nor repel as south poles are not magnetic
- D. They will attract initially then repel as the magnets become demagnetised
5. A compass is used to investigate the magnetic field around a bar magnet at two different distances. At distance X from the magnet, the field lines are spaced 2 cm apart. At distance Y (further away), they are spaced 5 cm apart. What can be concluded about the relative magnetic field strength?
- A. The field strength is the same at both distances
- B. The field strength is weaker at distance Y because the field lines are further apart
- C. The field strength is stronger at distance Y because the spacing is wider
- D. The field strength cannot be determined from spacing alone; only from the compass deflection angle