Demonstration Dynamo AC STEM Lab
Product Code : SCL-IMIC-12533
Quick Answer: The Demonstration Dynamo AC STEM Lab is an open-frame, hand-cranked AC generator in which a copper armature coil on a soft iron core turns between permanent magnets, with slip rings and carbon brushes taking off the output. A built-in LED lamp lights as the crank is turned.
Last updated: October 2026
Key Features
- Enamelled copper armature coil on a soft iron core
- Permanent field magnets around the armature
- 2 copper slip rings with spring-loaded carbon brushes
- Built-in LED lamp and output terminals for a galvanometer or oscilloscope
- Open frame on an insulating board with non-slip rubber feet
- Hand-cranked: no external power needed
Technical Specifications
| Specification | Value |
|---|---|
| Armature | Enamelled copper coil, soft iron core |
| Current collection | 2 copper slip rings, spring-loaded carbon brushes |
| Indicator | Built-in LED lamp, output terminals |
| Base | Insulating board, rubber feet |
| Size | Approx. 28 cm x 18 cm x 16 cm |
| Weight | 1.1 kg |
About This Product
Because every part is exposed, students can point out the magnets, coil, slip rings and brushes before turning the crank and watching the lamp light. Connecting a centre-zero galvanometer or oscilloscope to the terminals shows the current reversing each turn, and cranking faster raises both the frequency and the voltage, illustrating Faraday’s law and Lenz’s law.
Frequently Asked Questions
How does the Demonstration Dynamo AC STEM Lab give alternating current?
The coil turns in the magnetic field and its ends connect through slip rings and carbon brushes, so the output reverses direction every turn instead of being switched to one direction.
Related: Induction, Mutual Inductance Coils, Bicycle Wheel Dynamo Model STEM Lab and Mutual Induction Model STEM Lab.
For a quotation on the Demonstration Dynamo AC STEM Lab, contact Educational Instrument.
