Who this is for: Cambridge IGCSE Coordinated Science (0654) students who want magnetism — magnetic fields, poles, induced magnetism and electromagnets — to become a reliable source of marks instead of a diagram they cannot read.
What query it owns: how to understand and revise simple phenomena of magnetism in Cambridge IGCSE Coordinated Science.
Why this is safe: this page owns the magnetism revision-guide angle, while Tutopiya’s Simple Phenomena of Magnetism subtopic page owns the learning resource and the free Magnetism quiz owns the practice.

Magnetism is a force exerted by magnets and magnetic materials. Cambridge IGCSE Coordinated Science (0654) expects you to describe magnetic poles, plot field lines, explain induced magnetism and compare permanent magnets with electromagnets. This guide links each concept to the description and explanation questions examiners set.

Key takeaways

• Like poles repel; unlike poles attract.
• Magnetic field lines run from north to south outside the magnet.
• Field lines are closest where the field is strongest.
• Induced magnetism is temporary — it disappears when the inducing field is removed.
• Electromagnets can be switched on/off and have adjustable strength.

What is magnetism in Cambridge IGCSE Coordinated Science?

A magnet has two poles — north and south. A magnetic field exists around every magnet, shown by field lines that indicate the direction a north pole would move. Magnetic materials (iron, steel, nickel, cobalt) can be magnetised temporarily by induction or permanently by stroking or using a coil. Electromagnets use a current-carrying coil wrapped around a soft iron core.

You can read the full explanation, diagrams and notes on Tutopiya’s Simple Phenomena of Magnetism subtopic page before you attempt questions.

Magnetic fields and plotting methods

Feature of field lines	What it means
Direction N → S (outside magnet)	Force on a north pole
Lines closer together	Stronger field
Lines never cross	Unique direction at each point
Closed loops	Field continues inside magnet S → N

Method	How it works
Iron filings	Show pattern; do not show direction
Plotting compass	Small compasses placed step by step show direction
Compass needle	Points along field line direction

Magnetism in past-paper wording: command words that matter

Command word / phrase	What the question wants	Typical magnetism stem
Describe	What happens, in sequence	”Describe how to plot the magnetic field around a bar magnet.”
State	One fact	”State what happens when two north poles are brought together.”
Explain	Reason using physics	”Explain why a steel paper clip becomes a temporary magnet near a magnet.”
Compare	Similarities and differences	”Compare a permanent magnet with an electromagnet.”

Worked exam-style stems (how to answer the wording)

1. “State the rule for the force between two magnetic poles.” Like poles repel; unlike poles attract. Mark-scheme reward: both rules stated.
2. “Describe how a plotting compass is used to map the magnetic field around a bar magnet.” Place compass near magnet; mark direction; move compass so its south pole is where the north pole was; repeat to draw a continuous field line. Reward: step-by-step method with direction.
3. “Give two advantages of an electromagnet over a permanent magnet.” Can be switched on/off; strength can be varied (by current or number of turns). Reward: two distinct, valid advantages.

Test yourself with the Simple Phenomena of Magnetism quiz once you can plot fields, explain induced magnetism and compare magnet types.

How magnetism connects to the rest of Coordinated Science physics

Magnetism leads directly into Electrical Quantities and later Magnetic Effect of an Electric Current. The Cambridge IGCSE Coordinated Science resource hub links every Electricity And Magnetism subtopic.

Common mistakes students make

• Drawing field lines from south to north outside the magnet (they go N to S externally).
• Saying field lines cross (they never cross).
• Confusing iron filings (show pattern only) with a plotting compass (shows direction).
• Treating induced magnetism as permanent (it is temporary for soft iron).
• Forgetting that only magnetic materials can be magnetised (not all metals).

When you need more support

If magnetism questions keep costing marks, work through the Magnetism quiz, then get focused help from a Cambridge IGCSE Coordinated Science tutor.

Frequently asked questions

Is magnetism hard in Coordinated Science? Learn pole rules, how to read field-line diagrams, induced magnetism and electromagnet advantages — that covers most questions.

What materials can be magnetised? Iron, steel, nickel and cobalt are magnetic; most other metals (e.g. copper, aluminium) are not.

What is induced magnetism? A magnetic material becomes a temporary magnet when placed in a magnetic field; magnetism is lost when the field is removed.

How do I revise magnetism effectively? Practise field-line diagrams, pole interactions and electromagnet comparisons, then take the Magnetism quiz.

Ready to master Cambridge IGCSE Coordinated Science magnetism?

Start with the Simple Phenomena of Magnetism subtopic page, then book a free trial with a Cambridge IGCSE Coordinated Science specialist to turn magnetism knowledge into guaranteed marks.

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