‹ Science Essentials
Magnetism and electromagnetism
Magnets and field lines, electromagnets, the motor effect and F = BIl, then loudspeakers, generators, microphones and transformers.
Start: Magnets and magnetic fields About 12 min
Lessons
Practice and tests
By the end you can
Describe magnetic fields and plot them with a compass Explain how to make an electromagnet stronger and how one is used Use Fleming's left-hand rule and F = BIl (Higher) Explain loudspeakers, microphones and the generator effect (Physics only) Read peak, period and frequency from a generator's output graph Use the transformer equations (Physics only, Higher) Helps with: GCSE (AQA, Edexcel, OCR)
Next unit: Space physics Previous unit: Lenses, visible light, sound and black bodies
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