5K10.20 Induction Coil and Magnet
Concepts
Faraday's law, Lenz' law
Overview
A permanent magnet changes the flux through coil, generating a voltage that can be read by an analog voltmeter (you can pretend it's a galvanometer).
Details
Equipment
- [1] Coil
- [1] Permanent magnet
- [1] Analog voltmeter
- [1] (Optional) Windows laptop with LabVIEW
- [1] (Optional) NI USB-6212 DAQ
Classroom Assembly
- Connect the voltmeter to the coil or to the DAQ and computer.
- (For computer data collection) Load the voltage measurement VI on the computer.
Script
- (For computer data collection) Connect the laptop to the room's projector and start the voltage measurement VI.
- Move the magnet quickly towards the coil and stop.
- Move the magnet quickly away from the magnet.
- Flip the magnet pole and repeat steps 1-2.
- For maximum flux change, hold the magnet close to the coil and quickly flick your wrist to reverse the poles.
- (For computer data collection) Stop the voltage measurement VI.
Additional Resources
References
- PIRA 5K10.20
Disclaimer
- Don't attempt this at home!
Last revised
- 2023
Technicals
- The usual demo laptop takes about 5 minutes to run smoothly from cold boot.
- If running the computer, on the day before, check that all Windows updates have been applied.
Related AV
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If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.