Constantan Resistance Coil Wire
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Product Code : SCL-M-11251
The Constantan Resistance Coil Wire is a copper–nickel alloy wire used for constructing resistance coils, rheostats, bridge circuits and low-voltage electrical experiments. It is intended for school, college and technical laboratories that require resistance wire for supervised circuit construction, comparative measurement and component-winding activities.
Product Description
Constantan is an electrical resistance alloy based primarily on copper and nickel. Suitable Constantan grades provide useful electrical resistivity and comparatively limited resistance variation within a specified temperature range. The exact alloy composition and electrical properties depend on the supplied grade and must be confirmed from product or batch documentation.
The wire is supplied in coil form for convenient measuring, cutting and winding. It can support practical activities involving resistance, current control and bridge measurement within an electrical and electronics laboratory. Wire diameter directly affects resistance per unit length and permissible current, so the required gauge should be specified when ordering.
Key Features
- Constantan resistance alloy: Suitable for educational and general resistance-wire applications.
- Coil supply format: Enables convenient storage, cutting and controlled unwinding.
- Useful electrical resistivity: Allows practical resistance values to be produced from manageable wire lengths.
- Comparatively stable resistance: Appropriate grades exhibit limited resistance change over their specified temperature range.
- Multiple laboratory applications: Suitable for resistance coils, bridge experiments and rheostat winding.
- Hands-on learning: Helps students examine the effects of material, length and cross-sectional area on resistance.
- Low-voltage circuit use: Suitable for supervised experiments operated within the confirmed current rating.
Technical Specifications
|
Specification |
Detail |
|
Product name |
Constantan Resistance Coil Wire |
|
Product type |
Electrical resistance-alloy wire |
|
Alloy family |
Copper–nickel resistance alloy |
|
Supply form |
Coil |
What's Included in the Kit
- 1 × coil of Constantan resistance wire – weight and length
No former, terminals, connecting leads, meter bridge, rheostat body or measuring instrument is included unless separately specified.
Applications / Uses
- Constructing experimental wire-wound resistors.
- Preparing resistance coils for low-voltage circuits.
- Investigating how wire length affects electrical resistance.
- Comparing resistance wires of different materials or diameters.
- Replacing suitable winding on a Constantan or Eureka wire rheostat.
- Supporting resistance measurement with a meter bridge or Wheatstone bridge.
- Completing practical work in the broader physics laboratory equipment range.
How to Use the Constantan Resistance Coil Wire
- Confirm the wire gauge, resistance per metre and permissible current.
- Calculate or measure the wire length needed for the required resistance.
- Cut the wire using suitable laboratory cutters.
- Wind it evenly on a heat-resistant, electrically insulating former when constructing a coil.
- Prevent adjacent turns from touching if the wire is supplied without insulation.
- Prepare secure electrical connections at both ends.
- Connect the wire to a switched-off, current-limited low-voltage circuit.
- Energize the circuit briefly and monitor the wire for excessive heating.
Safety note: Never connect loose resistance wire directly to mains electricity. Excess current can heat the wire rapidly, cause burns and damage nearby materials.
Care & Maintenance
- Store the coil in a dry, labelled container away from corrosive chemicals.
- Prevent tangling, sharp bends and repeated flexing.
- Keep different gauges and alloy grades separately identified.
- Inspect used wire for oxidation, damaged insulation or overheated sections.
Why Choose Lab Equipments Ambala
Lab Equipments Ambala manufactures and exports scientific and educational laboratory equipment from Ambala, India. Its product range includes physics apparatus, resistance equipment, rheostats, meter bridges and classroom circuit accessories. The company supplies laboratory products for institutional and international requirements. Buyers should confirm the Constantan grade, wire gauge, coil quantity and electrical characteristics before ordering.
Frequently Asked Questions
What is Constantan Resistance Coil Wire used for?
It is used for winding resistance coils, rheostats and experimental resistors and for conducting bridge and resistance investigations.
What is Constantan wire made from?
Constantan is principally a copper–nickel resistance alloy. Its precise composition and minor alloying elements depend on the specified grade.
Is Constantan also called Eureka wire?
The names Constantan and Eureka are commonly used for related copper–nickel resistance alloys. The exact commercial grade and composition should still be verified.
How is the resistance of the wire calculated?
Wire resistance depends on the material resistivity, wire length and cross-sectional area. A longer or thinner wire generally provides greater resistance.
Can this wire be used in a meter bridge?
It can be used when its diameter, uniformity and resistance characteristics satisfy the experiment’s requirements.
Can Constantan wire be connected to mains electricity?
No. Use it only in an appropriately designed, current-limited circuit within its confirmed electrical and thermal ratings.
Browse the complete electrical and electronics laboratory equipment range from Lab Equipments Ambala for related rheostats, bridge apparatus and resistance-measurement accessories.
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