Electromagnetism

Electromagnetism CourseWelcome to the GCSE Physics Ninja Electromagnetism course.

These video lessons are based on question-and-answer flashcards. You can either make your own or purchase the printable flashcards from the shop.

What will I learn in this course?

When you have completed this course, you will be able to...

  • Describe the properties of magnets and their effects on other materials.
  • Recall the magnetic properties of iron vs. steel.
  • Draw the typical magnetic field pattern around a magnet.
  • Understand how to magnetise and demagnetise a magnetic material.
  • Explain how a current creates its own magnetic field.
  • Describe how to make a simple electromagnet and explain its various uses.
  • Understand the motor effect and use Fleming's left hand rule.
  • Describe the construction of a DC motor
  • Explain how electromagnetic induction can generate an EMF in a conductor.
  • Predict the direction of an induced current.
  • Describe how a rotating coil generator works.
  • Understand how a transformer uses electromagnetic induction to change voltages.
  • Recall the structure of a simple transformer.
  • Calculate input and output voltages using the transformer voltage-turns equation.
  • Use the transformer power equation to calculate voltages and currents.
  • Explain the differences between a standard iron core transformer and a switch mode transformer.

Electromagnetism

MagnetismThe Motor Effect
1. Properties of magnets 115. Force in a magnetic field
2. Properties of magnets 216. The motor effect
3. Magnets near materials17. Fleming's left hand rule
4. Materials containing iron18. Coil in a magnetic field
5. Magnetic properties of iron vs. steel19. The DC motor
6. Types of magnetic materials and their uses20. Electromagnetic force experiment
7. Magnetising and demagnetisingElectromagnetic Induction
8. Magnetic field pattern experiment21. Electromagnetic induction
Electricity & Magnetism22. Changing magnetic fields
9. Magnetic field lines due to a current23. How to increase and induced EMF
10. Variation of magnetic field strength24. Direction of an induced current
11. Effect of electrical currents25. The rotating coil generator
12. A simple electromagnet26. AC voltage generator graph
13. Relays27. Transformers
14. Electric bell28. Parts of a transformer
29. Transformer voltage and turns equation
30. Transformer voltage and turns calculation
31. Transformer power equation
32. Transformer power calculation
33. Switch mode transformers