Chapter 15
Magnetism and electromagnetism
A current produces a magnetic field and can experience a force in another magnetic field.
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Magnet properties and observations
Use attraction and repulsion to distinguish what an observation proves about a magnet or magnetic material.
Induced magnetism and material choice
Predict magnetisation near a magnet or inside a coil, then choose a material for retaining or losing it.
Finding field direction with a compass
Use the north-seeking end of a compass to plot a local field direction and follow a field line.
Magnetic field patterns
Draw consistent arrows around one bar magnet and between unlike or like facing poles.
Magnetic fields from currents
Draw straight-wire and solenoid fields, then predict the effects of changing or reversing current.
Magnetic force and its direction
Use a controlled wire experiment and Fleming's left-hand rule to determine force, field and current directions.
Why a current-carrying coil turns
Find the forces on the two active sides and explain their combined turning effect.