Fleming's Rule
| Formula / Notation | Left-hand rule (motor): F = IL × B; right-hand rule (generator) |
|---|---|
| Also Known As | Left-hand rule (motor rule), right-hand rule (dynamo rule), Lorentz force direction |
What is Fleming's Rule?
Rules devised by John Ambrose Fleming to determine the direction of current, force, or motion in electromagnetic devices. The left-hand rule applies to motors; the right-hand rule applies to generators. Each finger represents force, field, or current directions.
Formula & Notation
Other Names / Synonyms: Left-hand rule (motor rule), right-hand rule (dynamo rule), Lorentz force direction
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Rules devised by John Ambrose Fleming to determine the direction of current, force, or motion in electromagnetic devices. The left-hand rule applies to motors; the right-hand rule applies to generators. Each finger represents force, field, or current directions.
Fleming's rules are used in understanding electric motors, generators, and magnetohydrodynamic (MHD) devices. In chemistry, the right-hand rule is used to determine the direction of magnetic flux in NMR spectrometer magnets and in the Hall effect (determining charge carrier sign in semiconductors).
No direct safety concern for the conceptual rules. Electromagnetic devices governed by these rules (motors, generators, MRI machines) have associated electrical, mechanical, and magnetic hazards that require appropriate safety protocols.
The formula or notation for Fleming's Rule is: Left-hand rule (motor): F = IL × B; right-hand rule (generator)