What you'll learn
Magnetism and how it links to electricity.
Magnetism
- Magnetic poles and fields (north to south).
- Electromagnets and how to strengthen them.
Electromagnetic effects
- The motor effect — the force on a current-carrying wire in a field; electric motors.
Exam tips
- Draw field lines from north to south.
- Explain how current and turns affect electromagnet strength.
Common mistakes
- Reversing field-line direction.
- Confusing permanent and induced magnets.