A Level Physics · Topic hub
Electromagnetic Forces
A Level Electromagnetic Forces hub covering fields due to currents, forces on wires and moving charges, current balances, particle deflection and velocity selection.
Before you begin
Follow the lesson route in order when the topic is new. If you are revising, begin with the topic check and return to the lesson it identifies.
How the ideas connect
- Magnetic fields
- Forces on currents
- Forces on charges
- Torque and applications
Learn in order
Lesson route
Learning path
- 01Magnetic Fields Due to CurrentsCalculate and represent magnetic fields produced by currents.
- 02Magnetic Flux DensityAnalyse forces on current-carrying conductors, current balances and interactions between parallel currents.
- 03Current Balance (Measuring Magnetic Flux Density)Analyse forces on current-carrying conductors, current balances and interactions between parallel currents.
- 04Moving Charges in a Uniform Magnetic FieldAnalyse forces and paths of moving charges in uniform fields.
- 05Deflection of Charged Particles (Electric & Magnetic Fields)Analyse forces and paths of moving charges in uniform fields.
- 06Velocity SelectorApply crossed electric and magnetic fields to velocity selection.
Prove your understanding
Practice and repair
Key ideas and reference
Use this concise Electromagnetic Forces checklist for orientation. Open a linked lesson for definitions, derivations, diagrams and worked examples.
- Calculate and represent magnetic fields produced by currents.
- Apply crossed electric and magnetic fields to velocity selection.
Course coverage and review details
This hub groups the reviewed Electromagnetism lesson route.
Use the course context above when choosing qualification-specific practice and evidence.
Reviewed Jul 20, 2026
Frequently asked questions
What should I know before A Level electromagnetic forces?
Know conventional current, vector directions, circular motion and the force on a charge in a uniform electric field.
Which magnetic field patterns must I sketch?
Know the fields around a long straight wire, through a flat circular coil and inside a long solenoid, including their directions.
Does a magnetic field change a charged particle's speed?
A magnetic force is perpendicular to the particle's velocity, so it changes direction but does no work and does not change speed.
What should I do after this hub?
Take the electromagnetic-forces quiz and structured set, then continue to electromagnetic induction.