Quick Answer:The Rheostat 8 Inches is a compact sliding rheostat with an 8-inch (200 mm) vitrified ceramic tube, constantan (Eureka) wire and a spring-loaded phosphor-bronze brush, suited to small benches and portable experiment kits.
Last updated: 18 October 2026
Key Features
Compact 8-inch (200 mm) tube.
Oxidised constantan (Eureka) resistance wire.
Ceramic core for insulation and heat dissipation.
Spring-loaded phosphor-bronze brush with insulated handle.
Three 4 mm sockets or binding posts for rheostat and potentiometer modes.
Used as a variable resistor, the rheostat limits and adjusts current in student circuits; wired as a potential divider, it supplies a variable voltage. Its short length makes it easy to fit into individual student set-ups for Ohm’s law and circuit-theorem experiments.
Frequently Asked Questions
What modes does the Rheostat 8 Inches support?
Rheostat (variable resistor) and potentiometer (potential divider) modes, using its three terminals.
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