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Audited Supplier Sliding rheostat physics teaching equipment Slide Rheostat (23012)
Product Introduction
Sliding rheostat physics teaching equipment consists of main components such as wire-wound porcelain tube, sliding head, sliding rod, bracket, terminal and so on. It uses a copper-nickel alloy resistance wire with an oxide film insulating layer to be tightly wound on the porcelain tube. On the surface of the resistance wire, there is a conductive brush that can slide on the wire surface. It is a device that changes the length of the wire to change the resistance. , the purpose of changing the voltage and current by changing the resistance method.
Product Specification
| Resistance value(Ω) | Rated current(A) |
| 0~10 | 2 |
| 0~20 | |
| 0~50 | 1.5 |
| 0~200 | 1.25 |
| 0~5 | 3 |
The error of varistor resistance value should not exceed ±10%.
The varistor can work continuously under the conditions of ambient temperature -10°C to +40°C and relative humidity not greater than 85%.
* Scale length printed on the top of slide rheostat: 0-100mm
* Dia of Porcelain pipe: 45mm
* Slide block can be adjustable and range from 0-100mm
* Slide contact by carbon brush
* Slide rheostat can be make with different resist and ameter as following:
10Ω,5.6A ;180Ω,2A;333Ω,0.95A
* Overal size: 270mm×95mm×135mm
Product feature and application
The sliding rheostat physics teaching equipment is used for research and testing in the laboratory, in standard electrical instruments to change voltage and current or as a variable resistor to replace undetermined resistance values, and in teaching for middle school physics teachers to demonstrate or students to use in group experiments.
Maintenance and precautions
1. The varistor should not be used too close to objects that cannot be heated.
2. If the varistor is not used for a long time, an oxidized insulating layer may be produced at the contact point between the brush and the resistance wire, resulting in poor contact. At this time, the oxidized layer must be wiped off before use. Long-term vibration and other reasons may cause loose screws and loose sliding heads, so they should be eliminated in time and properly stored.
3. The varistor should not exceed the rated maximum load.
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