Rheostat Nichrome Wire Groove Type
Product Code : EL-EAE-10288
Quick answer: The nichrome wire rheostat, groove type, is a sliding resistor that students use to vary current or to divide a supply voltage in physics circuit work. It has a nichrome winding on a heat-resistant porcelain tube, a phosphor-bronze double-contact slider and three brass terminals, with ratings from 0.3 to 6.5 A. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Component | Specification |
|---|---|
| Winding | Nichrome wire |
| Former (pipe) | Special porcelain, heat-resistant and insulated |
| Slider contact | Phosphor bronze, double contact system |
| Slider block | Heavy brass block, moving on a sliding rod |
| End supports | Bakelite or aluminium moulded |
| Terminals | Three brass terminals |
| Current rating | 0.3 A to 6.5 A, depending on the model |
Uses in circuit experiments
In the laboratory the groove-type nichrome rheostat is placed in series with a load to limit and set the current, or wired across a supply as a potential divider. Typical practical work includes plotting V-I graphs for a resistor, controlling the current through a coil or lamp, and setting the current through a potentiometer wire so that the balance point falls on the scale.
Nichrome, a nickel-chromium alloy, has a high resistivity and withstands high temperatures without rapid oxidation, so a compact coil gives a useful resistance and copes with the heat produced at higher currents. As the name indicates, the winding of a groove-type rheostat lies in a grooved former, which keeps neighbouring turns apart.
Nichrome's resistance rises slightly as it heats, so give the coil a moment to settle before recording readings at the upper end of its current range, and switch off between sets of readings.
Key features
- Nichrome wire winding with high resistivity and good heat tolerance for general circuit work.
- Groove-type porcelain former that is heat-resistant and electrically insulated.
- Double-contact slider with phosphor-bronze contacts running smoothly on the sliding rod.
- Heavy brass slider block for steady movement over long use.
- Three brass terminals for series current control or a potential-divider connection.
- Current ratings from 0.3 A to 6.5 A, on Bakelite or aluminium moulded end supports.
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the nichrome wire 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
- Rheostat Constantine (Eureka) Wire (EL-EAE-10287)
- Meter Bridge or Wheatstone Bridge with Pencil Jockey (EL-EAE-10289)
- Resistance Box Electronic Type (EL-EAE-10286)
- Potentiometer with Jockey Pencil (EL-EAE-10290)
- Post Office Box Plug Type (EL-EAE-10285)
- Pencil Jockey (EL-EAE-10291)
The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What current ratings does the groove type rheostat come in?
Ratings from 0.3 A to 6.5 A are available. State the rating and resistance required when asking for a quote.
How does a nichrome rheostat differ from a constantan rheostat?
Nichrome has a higher resistivity and tolerates heat well, which suits general current control. Constantan keeps its resistance almost constant as it warms, which suits measurements that need a very stable setting.
What is the price of the nichrome wire rheostat?
Prices are not published on the website. Add the nichrome wire rheostat to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-EAE-10288 and the quantity, to receive a quotation.
Does Lab Exports manufacture the nichrome wire rheostat?
Yes. Lab Exports manufactures the nichrome wire rheostat at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-EAE-10288.
Request a quote
Email [email protected] with the house code EL-EAE-10288 and the quantity, or add the nichrome wire rheostat to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
