Back to Separate Sciences (Biology, Chemistry, Physics)Practice this
Paper 2
Magnetism & Electromagnetism
Both
Field lines go from north to south.
Key Facts
- Motor effect uses current in a magnetic field.
- Generator effect induces voltage by moving through a field.
Topics Covered
Magnetic Fields
What you need to know
- •Field lines go from north to south.
- •Field strength is shown by line spacing.
Exam Tips
- Draw arrows on field lines.
Electromagnets
What you need to know
- •Current produces a magnetic field.
- •Iron core makes field stronger.
Exam Tips
- State how to increase strength: more turns, more current.
Key Terms
Solenoid
A coil of wire that produces a magnetic field when current flows.
Induced voltage
Voltage produced by changing magnetic field.
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Common Exam Questions
State two ways to increase the strength of an electromagnet.
2 markseasyPaper 2
Model Answer
Increase current or add more turns of wire (or add iron core).
What examiners want to see
- ✓Give two valid methods.
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