Force on a current in a magnetic field
Motor principle and the role of the commutator.
Electromagnetic phenomenaFields, electromagnets, motors, and induction conditions.
Start here
Force on a current in a magnetic field
Current in a B-field feels F=BIL; commutator keeps motor spinning. This “Force on a current in a magnetic field” page is an MVP interactive sketch — formulas, controls, and live readouts in the browser; a fuller bench may follow.
Current in a B-field feels F=BIL; commutator keeps motor spinning.
Key formulas
F=BIL
How to use
- Adjust parameters in the left panel.
- Use play / pause and speed controls.
- Match right-side readouts to the formulas.
- Reset to return to the initial state.
Applications
- Force on a current in a magnetic field: Current in a B-field feels F=BIL; commutator keeps motor spinning.
- In class, tune parameters for “Force on a current in a magnetic field”, then check against the textbook result.
FAQ
What does MVP mean on this page?
An interactive sketch with formulas and parameters. Polished Ready labs are the full bench experience.
What does the “Force on a current in a magnetic field” lab practice?
Tune parameters and match readouts to the “Force on a current in a magnetic field” relations — useful for prep and demos.
How do I find the Ampere force direction?
Left-hand rule: B into palm, fingers along I, thumb along F.
When is there an induced current?
When flux through a closed loop changes, or a conductor cuts field lines.