Rheostat – Single Tube, 20 Ohms, 4.5 Amps [1192]

This robust Single Tube Rheostat (20 Ohms, 4.5 Amps) is designed for reliable use in school physics laboratories. Manufactured with die‑cast metal feet for enhanced stability and durability, this rheostat provides smooth and precise control over resistance in electrical circuits.

The unit is wound with heavily oxidised resistance wire on a strong porcelain tube, ensuring excellent heat resistance, longevity, and consistent performance. Ideal for demonstrations and practical work, this rheostat allows students to investigate key electrical principles safely and effectively.

Key Features

• Single Tube Rheostat for variable resistance control
• Resistance value: 20 Ohms
• Maximum current capacity: 4.5 Amps
• Mounted on robust die‑cast metal feet for stability
• Wound with heavily oxidised resistance wire
• Durable porcelain tube construction
• Ideal for school laboratory use and physics demonstrations

Ideal for School Science Lessons

Perfect for KS3, KS4, and GCSE Physics, this rheostat supports hands‑on learning about electrical circuits and the relationship between voltage, current, and resistance. Its sturdy design makes it ideal for repeated classroom use.

• Investigating Ohm’s Law in practical circuits
• Demonstrating how variable resistance affects current flow
• Controlling current for experiments using bulbs, motors, or buzzers
• Building adjustable circuits for comparative testing
• Encouraging enquiry‑based learning through hands‑on circuit control

Reliable, durable, and designed with education in mind, this 20 Ohm Rheostat is an essential component for any school physics laboratory.