Aexit Scientific Laboratory Fixed Resistors Slide Rheostat Variable Resistor 20 Ohms Single Resistors 2 Amps

Feature
Slide wire rheostatUseful as a basic component for any electrical laboratory
Madeof oxidized resistance wire of copper nickel alloy
Metal end supports with provision for screw mounting
Usage
1.Whenadjustingthe current in the circuit,slide rheostat should keepSeries Connectioninthe circuit, and keep theresistanceof the Rheostat up to maximum.

Then connecting the power supply,slide the conductive brush,gradually reducing resistance to make the current suitable.
2.When adjusting the voltage of the circuit between two points,slide rheostat shouldParallelConnection in circuit,and keep theresistanceof the Rheostat down tominimum.Then connecting the power supply,slide the conductive brush,gradually reducing resistance to makevoltage ofthe currentendssuitable.
Note
1.When using the rheostat, it should not be too close to the heat source.
2.Rheostat long-term use may cause poor contact between oxidation insulation and the resistance wire brush.

Before using, it should be wiped away the oxide layer. Long vibration and other reasons,it may appear screw loose,sliderloose and other illnesses , pay attention to check eliminated.
3.Rheostat should not exceed the rated maximum load.