Dual Tube Variable Rheostat

Product Code : SCL-EAE-11313

The Dual Tube Variable Rheostat is a laboratory variable-resistance apparatus used to control current, divide voltage and adjust electrical loads. Its two-tube configuration provides an extended or dual resistance arrangement for supervised school, college and introductory electrical circuit experiments.

Product Description

The apparatus uses resistance wire wound around two insulated tubes and one or more movable contacts that alter the effective wire length connected in the circuit. Moving a slider across the winding changes resistance continuously, enabling controlled adjustment of current or output voltage.

Depending on the final terminal and winding arrangement, the two resistance sections may operate independently, in series, in parallel or as separate potential-divider elements. These operating modes must not be assumed without a confirmed circuit diagram. The resistance range, current rating, winding alloy and power-dissipation capacity must also be specified before ordering.

Key Features

• Dual-tube construction: Provides two wire-wound resistance sections in one laboratory assembly.
• Continuous adjustment: Sliding contacts vary the active resistance without changing fixed components.
• Current-control capability: Can be connected in series with a load when its ratings match the circuit.
• Potential-divider use: Suitable terminal arrangements may provide adjustable voltage output.
• Heat-resistant support: Resistance windings are typically carried on insulated tubes; exact material [confirm].
• Educational terminal layout: Designed for repeated connection in laboratory circuit experiments.
• Manual operation: Requires no separate power source beyond the experimental circuit.

Technical Specifications

What's Included

• One dual-tube variable rheostat assembly
• Two wire-wound resistance tubes
• Sliding contact assemblies
• Laboratory connection terminals
• Connecting leads
• Circuit diagram and operating instructions

Applications

• Controlling current in low-voltage laboratory circuits.
• Adjusting voltage through a potential-divider connection.
• Conducting Ohm’s law and current-voltage investigations.
• Providing variable resistance in meter-bridge and potentiometer experiments.
• Comparing series and parallel resistance arrangements where supported.
• Adjusting lamp, motor or electromagnet current within confirmed ratings.

Related equipment includes the Constantine Wire Rheostat, the Nichrome Wire Rheostat, the Plug-Type Resistance Box and broader Electrical and Electronics Equipment.

How to Use the Dual Tube Variable Rheostat

1. Switch off the laboratory power supply before making connections.
2. Review the confirmed terminal diagram for both resistance tubes.
3. Select the required independent, series, parallel or potential-divider connection.
4. Set each slider initially to provide a safe resistance level.
5. Switch on the low-voltage supply and monitor circuit current.
6. Move the sliders gradually to obtain the required circuit condition.
7. Keep current and power within the confirmed ratings of both windings.
8. Switch off the supply before changing connections.

Safety note: Resistance tubes and windings can become hot during operation. Do not touch them immediately after use, exceed the confirmed current rating or connect the apparatus directly to an unsuitable mains supply.

Care & Maintenance

• Keep resistance windings clean and free from conductive debris.
• Move sliders gently without forcing them over damaged wire.
• Inspect terminals, contact pressure and supports periodically.
• Allow both resistance tubes to cool before handling or storage.

Why Choose Lab Equipments Ambala

Lab Equipments Ambala manufactures and supplies rheostats, resistance boxes and educational electrical apparatus from Ambala, India. Its published rheostat range includes Constantine/Eureka-wire and nichrome-wire configurations for current-control experiments. The equipment is intended for school, college and institutional physics laboratories. Buyers should provide the required resistance, current rating and dual-tube connection arrangement when requesting a quotation.

Frequently Asked Questions

What is a Dual Tube Variable Rheostat used for?

It is used to vary resistance, control circuit current and provide adjustable voltage in educational electrical experiments.

Why does the rheostat have two tubes?

The dual-tube design provides two resistance windings, but their exact electrical relationship must be confirmed from the terminal diagram.

Can both tubes be connected in series?

Series operation may be possible, but it should only be used when the manufacturer confirms the terminal arrangement and combined ratings.

What resistance and current rating are supplied?

These specifications are not published for the requested model and must be selected before ordering.

Can it be used as a potential divider?

Yes, when the terminal configuration provides access to the winding ends and sliding contact required for potential-divider operation.

Does the apparatus require electricity?

It requires no independent power source, but it operates as part of a suitable low-voltage experimental circuit.

Specify the resistance per tube, current rating, winding material and required connection modes, or explore the Electrical and Electronics Equipment category for related laboratory rheostats.