Adjustable Sliding Rheostat 2A 20Ω Sliding Resistor Precise resistance control for circuit experiments Precisely control electrical resistance to study how current varies in circuits. A key tool for understanding Ohm's law and current behavior during experiments. Durable construction with clear calibration Made from ABS plastic and metal for sturdiness in classroom and lab use. The unit features a sliding design with a clear calibration scale for easy, repeatable adjustments and quick readings. Clear performance for reliable experimentation 2A maximum current with a 20Ω nominal resistance provides a dependable, easytouse rheostat for educational and hobby projects. Smooth sliding action supports steady adjustments during demonstrations and measurements. Suitable for a wide range of users Ideal for students, physics teachers, science enthusiasts, electricians, and electronics hobbyists who want a handson learning tool that delivers consistent results. Versatile uses in education and testing Widely used in physics laboratories, electrical course demonstrations, and circuit project development and testing environments. Use scenarios 1) Ohm's law classroom demonstration: connect to a fixed voltage source and vary the resistance to visualize changes in current and voltage. 2) Lab demonstrations of circuit behavior: adjust the load in a simple circuit to show realtime changes in current and readings on measurement instruments. 3) Prototyping and testing: tune a small circuit in a project to achieve target current levels during development and validation.