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Separate Physics

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Electromagnetism

CLARITY | CONFIDENCE | CURIOSITY

Electromagnetism

Discover magnetic fields, electromagnets, generators and transformers, and how electricity and magnetism interact.

Lessons

Explore the lessons below to build your knowledge and confidence across this topic. Each lesson breaks the physics down into clear, manageable steps, with explanations, practice and exam-focused activities to help you understand the key ideas and apply them successfully.

Magnetic Fields

01

Explore magnetic poles and field direction and and map a magnetic field.

Permanent and Induced Magnets

02

Explore permanent and induced magnetism and magnetisation of iron.

Magnetic Fields Around Wires

03

Explore the field around a straight current-carrying wire and the right-hand rule for field direction.

Magnetic Fields Around Solenoids

04

Explore solenoid and electromagnet field patterns and methods of increasing field strength.

The Motor Effect

05

Explore the motor effect and left-hand-rule directions and force directions.

Force on a Current-Carrying Wire

06

Explore quantities and units in F = BIl and force for a perpendicular wire.

Electric Motors

07

Explore motor components and their functions and forces on opposite coil sides.

Electromagnetic Induction

08

Explore conditions for induced p.d. and current and effects of movement and field changes.

Generators

09

Explore alternator and dynamo outputs and output p.d.–time graphs.

Microphones

10

Explore moving-coil microphone components and the sequence from sound to signal.

Loudspeakers and Headphones

11

Explore moving-coil speaker components and the sequence from current to sound.

Transformers

12

Explore transformer components and turn arrangements and induction through a changing core field.

Transformer Calculations

13

Explore transformer turns and power relationships and secondary p.d. from turns.

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