Rheostat 12 Inches
Product Code : SCL-PLE-11800
Quick Answer: The Rheostat 12 Inches is a sliding rheostat with constantan (Eureka) wire wound on a 12-inch (300 mm) vitrified ceramic tube and a phosphor-bronze slider, usable as a two-terminal variable resistor or a three-terminal potential divider.
Last updated: 18 October 2026
Key Features
- 12-inch (300 mm) tube for a long, fine adjustment.
- Oxidised constantan (Eureka) wire on a vitrified ceramic core.
- Low-friction phosphor-bronze brush with insulated handle.
- Two-terminal or three-terminal use.
- Metal end supports with anti-slip mounting.
Technical Specifications
| Specification | Value |
|---|---|
| Tube length | 12 in (300 mm) nominal |
| Resistance wire | Oxidised constantan (Eureka) |
| Core | High-temperature vitrified ceramic tube |
| Slider | Phosphor-bronze brush, insulated handle |
| Terminals | Three |
| Frame | Metal end supports, anti-slip mounting |
How It Is Used
With one end terminal and the slider connected, the rheostat varies the current through a circuit, for example to take a set of Ohm’s law readings. Using both end terminals and the slider gives a potential divider, so a smoothly variable voltage can be fed to a component under test.
Frequently Asked Questions
Can the Rheostat 12 Inches be used as a potential divider?
Yes. Two terminals give a variable resistor; all three terminals give a potential divider.
Related Physics Lab Equipment
See the full physics lab equipment range, or these related rheostats and Ohm’s law items:
- Rheostat 10 Inches
- Rheostat 8 Inches
- Rheostat 6 Inches
- Sliding Rheostat Dual Tube
- Ohms Law Apparatus
Laboratories and education suppliers in Saint Lucia, Palestine, North Macedonia, United States and Afghanistan can source the Rheostat 12 Inches from JLab India for export.
For a quotation on the Rheostat 12 Inches, contact JLab India on +91-8569909696.
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