Rheostat 8 Inches
Product Code : SCL-EAE-11282
Quick answer: The Rheostat 8 Inches is a compact sliding rheostat for student electricity practicals. A movable contact changes the resistance between the selected terminals, so learners can vary current and voltage, dim or brighten a lamp and record meter readings as the slider moves. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Apparatus type | Sliding variable resistor |
| Nominal size | 8 inches |
| Adjustment | Movable sliding contact |
| Primary function | Variable resistance and current control |
The resistance value and current rating are not listed here; request them before ordering so the rheostat matches the supply and load.
How the rheostat is used in student circuits
In a series circuit the rheostat shares the supply voltage with the load. Sliding the contact to include more of the winding raises the total resistance, so the current and the voltage across the load both fall; sliding it back does the opposite. The compact 8-inch format suits classroom demonstrations and student practical sets.
- Place the rheostat on a clean, dry, stable bench and check its resistance and current rating against the circuit.
- Wire the supply, key, lamp or resistor, ammeter and rheostat in series, with a voltmeter across the load.
- Begin with the slider at maximum resistance, then close the key.
- Move the slider in steps and note how the lamp brightness and the meter readings change.
Students see directly that more resistance means less current, which prepares them for the quantitative Ohm's law experiment.
Key features
- Compact nominal 8-inch format
- Sliding contact adjusts resistance between the selected terminals
- Shows the effect of resistance on both current and load voltage
- Connects with low-voltage supplies, switches, leads and lamps
- Works with ammeters and voltmeters for recorded readings
- Reusable across laboratory sessions within its rating
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the 8-inch 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 10 Inches (SCL-EAE-11281)
- Tapping Key (SCL-EAE-11283)
- Rheostat 12 Inches (SCL-EAE-11280)
- Rheostat 6 Inches (SCL-EAE-11284)
- Sliding Rheostat Dual Tube (SCL-EAE-11279)
- Four Way Plug Key (SCL-EAE-11285)
The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What can students demonstrate with an 8-inch rheostat?
How increasing resistance reduces current, how the voltage across a lamp or resistor changes as the slider moves, and the working principle of a sliding variable resistor.
Where should the slider be before switching on?
At the maximum-resistance end, so the current starts at its lowest value and is then raised gradually.
What is the price of the 8-inch rheostat?
Prices are not published on the website. Add the 8-inch rheostat to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11282 and the quantity, to receive a quotation.
Does Lab Exports manufacture the 8-inch rheostat?
Yes. Lab Exports manufactures the 8-inch rheostat at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11282.
Request a quote
Email [email protected] with the house code SCL-EAE-11282 and the quantity, or add the 8-inch rheostat to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
