1pc 10 Ohm 2A Sliding Rheostat Science Discovery Toys Adjustable Resistance Ohmic Electrical Circuit Physics Experiment Educational Toy

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 oxi