Quick Answer: The Rheostat 12 Inches has a 300 mm (12 inches) winding of oxidised resistance wire on a vitrified ceramic tube. Three terminals with 4mm binding posts let it act as a variable resistor or a voltage divider.
Last updated: October 2026
Key Features
300 mm (12 inches) active winding length
Oxidised resistance wire on a vitrified ceramic tube
Three terminals with 4mm binding posts
Die-cast metal end supports
Metal contact wiper with an insulated handle
Technical Specifications
Specification
Value
Winding length
300 mm (12 inches)
Former
Vitrified ceramic tube
Wire
Oxidised resistance wire
Terminals
Three, 4mm binding posts
End supports
Die-cast metal
About This Product
Moving the wiper along the 12-inch winding changes how much wire is in the circuit, so students can set and vary current smoothly. With all three terminals in use it supplies an adjustable voltage for Ohm’s law and characteristic-curve work.
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