Magnetism & Electromagnetism Quiz
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5 questions, one answer each
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1. Two north poles are brought close together. What happens?
- A. A. They attract
- B. B. They repel
- C. C. Nothing happens
- D. D. They induce magnetism in each other
2. What shape are the magnetic field lines around a straight current-carrying wire?
- A. A. Straight lines parallel to the wire
- B. B. Concentric circles perpendicular to the wire
- C. C. Radiating lines from the wire
- D. D. Parallel lines perpendicular to the wire
3. An unmagnetised iron nail is brought near a bar magnet. What happens?
- A. A. It is repelled
- B. B. Nothing, iron cannot be magnetised
- C. C. It becomes induced and is attracted
- D. D. It becomes permanently magnetised only
4. A student wants to increase the strength of an electromagnet made from a solenoid. Which change would NOT achieve this?
- A. A. Increasing the current
- B. B. Adding an iron core
- C. C. Increasing the number of turns
- D. D. Reversing the direction of the current
5. A ship's compass points steadily north while sailing. What does this demonstrate?
- A. A. The ship has its own magnetic field
- B. B. The compass magnet aligns with the Earth's magnetic field
- C. C. The Earth has no magnetic field at the equator
- D. D. Induced magnetism in the compass needle