Sliding Rheostat Dual Tube
Product Code : SCL-EAE-11279
Quick answer: The Sliding Rheostat Dual Tube is a variable resistor with two resistance tubes on one base and a movable sliding contact. Moving the slider changes the length of resistance wire in the circuit, so students can set and control current in Ohm's law, potential-divider and series-circuit practicals. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Apparatus type | Sliding variable resistor (rheostat) |
| Tube configuration | Dual tube - two resistance-tube sections on one base |
| Adjustment | Movable sliding contact |
| Connections | Electrical connection terminals |
| Primary function | Variable resistance and circuit-current control |
| Supplied as | One apparatus with integrated sliding-contact mechanism |
Resistance value and maximum current rating are not listed on this page; ask for them with the quotation so the rheostat can be matched to the circuit.
How the sliding rheostat is used
A rheostat works on the relation R = rho L / A: the resistance of a uniform wire rises in proportion to its length. The sliding contact picks off a chosen length of the winding, so moving it along the tube changes the resistance in the circuit and, by Ohm's law (I = V / R), the current that flows.
With two tube sections on one base, the dual-tube rheostat gives teachers a clear, visible resistance path for bench demonstrations. Connected through one end terminal and the slider, it acts as a variable series resistor; where the circuit calls for it, it can also be wired as a potential divider that takes a variable voltage from the slider.
- Keep the supply switched off and connect the rheostat in series with the load, an ammeter and a plug key.
- Set the slider at the end that gives maximum resistance before closing the key.
- Switch on the low-voltage supply and move the slider in small steps, noting the ammeter reading at each position.
- Open the key between readings so the winding does not heat up.
The readings show current rising as the active wire length falls, which is the basis of the resistance-current and Ohm's law practicals in school and college physics.
Key features
- Two resistance-tube sections mounted on one laboratory base
- Movable sliding contact for gradual change of resistance
- Controls current through lamps, coils and resistive loads in low-voltage circuits
- Electrical connection terminals for leads, meters and power supplies
- Visible winding makes the length-resistance relation easy to show
- Reusable for repeated practicals when used within its rating
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the dual tube sliding rheostat at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Electrical and Electronics products
- Resistance Box 100 Ohms (SCL-EAE-11278)
- Rheostat 12 Inches (SCL-EAE-11280)
- Resistance Box 1000 Ohms (SCL-EAE-11277)
- Rheostat 10 Inches (SCL-EAE-11281)
- Resistance Box 10000 Ohms (SCL-EAE-11276)
- Rheostat 8 Inches (SCL-EAE-11282)
The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What is a dual tube sliding rheostat used for?
It is used to vary resistance and control current in a circuit, for example in Ohm's law experiments, resistance-current studies and lamp or coil circuits. It can also demonstrate potential-divider operation.
How does moving the slider change the current?
Moving the slider lengthens or shortens the part of the resistance winding in the circuit. More wire means more resistance and less current for the same supply voltage; less wire means lower resistance and more current.
What is the price of the dual tube sliding rheostat?
Prices are not published on the website. Add the dual tube sliding rheostat to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11279 and the quantity, to receive a quotation.
Does Lab Exports manufacture the dual tube sliding rheostat?
Yes. Lab Exports manufactures the dual tube sliding rheostat at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11279.
Request a quote
Email [email protected] with the house code SCL-EAE-11279 and the quantity, or add the dual tube sliding rheostat to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
