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Rheostat
Rheostat (Product Code: SCL-351/074) is a 50 ohm sliding-contact variable resistor used to regulate current and set voltages in physics laboratory circuits at schools and colleges. Its higher total resistance gives a wider adjustment range than low-value models, useful when a supply must be held back to a small current, and it can be wired as a rheostat or a potential divider. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Capacity | 50 ohm total resistance |
| Terminals | Three lock-type brass socket terminals, properly insulated |
| Terminal arrangement | Sliding contact on one terminal; winding ends on the other two |
| Slider | Double contact system on a contact block that moves smoothly on the sliding rod |
| Guide rod | Brass, secured with a brass screw |
| Rating label | Total resistance and maximum current capacity marked on the slider |
| Product code | SCL-351/074 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the 50 Ohm Rheostat Used For?
Teachers use it to limit and vary current in circuits for verifying Ohm's law, studying the heating effect of current, and plotting the characteristics of components such as resistors and bulbs. Wired as a potential divider, it provides a variable voltage from a fixed supply for voltmeter and potentiometer work.
With 50 ohm available, the slider can bring the current well down before the circuit is switched on, which is kinder to meters with small ranges. Check the maximum current marked on the slider, never set the slider to the zero-resistance end while the supply is on, and keep the terminals tight. It is a dependable laboratory rheostat for general current-electricity practicals.
What to Specify When Ordering
- Resistance value: this model is 50 ohm; the Rheostat 30 Ohm is also listed.
- The maximum current your circuit needs, to compare with the rating marked on the slider.
- Quantity required for your laboratory.
OEM Manufacturer
Jain Scientific Equipments Private Limited, trading as ScienceLab, is the OEM for this 50 ohm rheostat and makes it at its own licensed factory at Saha, Ambala, Haryana, India. Institutional and tender buyers who need vendor registration details can use GSTIN 06AAECJ8618A1ZT and LEI 3358004HRD1JIVXKYX49. Quotations and repeat orders come straight from the manufacturer. Read more on the company profile.
Related Physics Lab Equipment
For current-control and voltage-divider experiments with this rheostat, laboratories commonly add:
- Rheostat 30 Ohm — a lower-value option for finer current control.
- Voltmeter — measures the voltage set with the potential divider.
- Milliammeter — reads small currents in the controlled circuit.
- Connecting Wire — for wiring the rheostat into student circuits.
Visit the Physics Lab category for more electricity apparatus.
Frequently Asked Questions
What is the resistance of this Rheostat?
This Rheostat has a capacity of 50 ohm, and the total resistance is marked on the slider along with the maximum current capacity. For finer control in low-resistance circuits, the Rheostat 30 Ohm is also available from ScienceLab.
How is the Rheostat wired as a potential divider?
To use the Rheostat as a potential divider, connect the supply across its two winding-end terminals and take the output between one end and the sliding-contact terminal. Moving the slider then varies the output voltage smoothly from zero up to the full supply.
What terminals does the Rheostat have?
The Rheostat has three lock-type brass socket terminals with proper insulation, so leads stay secure during a practical. One terminal serves the sliding contact, and the other two are joined to the ends of the resistance winding.
Who manufactures the Rheostat?
The Rheostat is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM, at its own licensed factory in Saha, Ambala, Haryana, India. Buyers get quotations and repeat supplies directly from the manufacturer, without an intermediary.
What current can the Rheostat carry?
The maximum current capacity of the Rheostat is marked on its slider, but the figure is not given in the listing. Tell us your supply voltage and expected current through the contact page, and we will confirm whether the 50 ohm model suits your circuit.
How should the Rheostat be maintained?
Keep the Rheostat in a dry cupboard, wipe the brass guide rod so the double-contact slider keeps moving smoothly, and check that the brass screw holding the rod stays tight. Do not exceed the current marked on the slider, as overheating can damage the winding.
Request a Quote
Request the 50 ohm Rheostat through our contact page or the enquiry cart. The quotation is sent by the manufacturer.
Last updated: 24 September 2026
