Description: It is an experimental facility for children to experiment and learn the Physics, it can slide resistance. Item: Slide Rheostat; Size: about 16cm; Usage: 1. When the current in the circuit is used to adjust the intensity , it should slide rheostat in series with the circuit, and the first raised to the maximum slip resistance rheostat , connect the power supply , then slide the conductive brush , gradually reducing resistance , so that the current strength suitable amount is gradually increased. 2. When used to adjust the voltage of the circuit between two points , and the circuit should varistor connected in parallel , and the first rheostat resistance to minimum , connect the power supply , then slide the conductive brush , and gradually increase the resistance , the circuit ends voltage is gradually increased to the appropriate value. Note: 1. when the rheostat use should not be too close to the heat source. 2. rheostat long-term use may cause poor contact oxidation insulation in contact with the resistance wire brush , then wipe away the oxide layer must be used. Long love vibration and other reasons, it may appear screw loose, loose slider and other illnesses , pay attention to check eliminated. 3. rheostat should not exceed the rated maximum load. Package Included: 1x Slide Rheostat; 1x Manual