GCSE Physics - How the Electric Motor Works

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*** WHAT'S COVERED ***
1. The motor effect: How a current-carrying wire experiences force in a magnetic field.
* Using Fleming's Left-Hand Rule to determine the direction of the force.
2. How a coil of wire rotates in a magnetic field.
* Explanation of the opposing forces acting on each side of the coil.
* Why the coil would reverse its rotation every half turn without a commutator.
3. The role and function of a split-ring commutator in a DC motor.
4. Factors affecting the speed of rotation of an electric motor.

*** EXAM BOARD INFO ***
AQA - Higher tier only
IGCSE Edexcel - Everything is relevant to your course
Edexcel - Higher tier only
OCR 21st Century - Higher tier only
OCR Gateway - Higher tier only

*** CHAPTERS ***
0:00 Intro: The Motor Effect
0:25 Fleming's Left-Hand Rule
1:02 Forces on a Coil & Initial Rotation
1:34 Problem: Why the Coil Reverses Rotation
2:26 Solution: The Split-Ring Commutator
3:16 How the Commutator Works
4:21 Increasing the Speed of Rotation

*** PLAYLISTS ***










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