Digital Ohms Law Apparatus
Product Code : SCL-EAE-11335
Quick answer: The Digital Ohms Law Apparatus is used to verify Ohm's law, V = IR, by recording paired voltage and current readings on digital displays for a resistive conductor, then plotting a V-I graph and calculating resistance. Direct numerical readings suit both individual practicals and class demonstrations. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Primary experiment | Study and verification of Ohm's law |
| Measurement format | Digital indication of voltage and current |
| Readings taken | Paired voltage and current values for V-I graph plotting |
| Result | Resistance from R = V/I and from the gradient of the V-I graph |
| Brand | Lab Exports |
How the Ohm's law experiment is done
Ohm's law states that the current through a conductor is directly proportional to the potential difference across it, provided its temperature and other physical conditions stay the same: V = IR, where R is the resistance. A graph of V against I for an ohmic conductor is therefore a straight line through the origin whose gradient equals R.
Here the voltage and current readings are shown digitally, which removes parallax and scale-reading errors and lets students concentrate on taking a good spread of readings and judging whether the relationship is linear.
- Place the apparatus on a dry, stable bench, switch off and set the adjustable controls to minimum.
- Connect the resistive load as shown in the circuit diagram, with current measured in series and voltage measured across the load.
- Switch on and raise the voltage in small steps, noting the voltage and current readings each time.
- Take at least five or six pairs of readings, then switch off.
- Plot V against I, draw the best straight line and find R from its gradient; compare with R = V/I for each pair.
Repeating the readings and comparing the calculated resistance with the stated resistor value also gives a simple introduction to measurement uncertainty.
Key features
- Verifies V = IR by direct measurement of voltage and current
- Digital indication gives easy-to-read values
- Paired voltage and current readings for V-I graph plotting
- Resistance calculated from R = V/I and from the graph gradient
- Reusable set-up for repeated trials without assembling separate instruments
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Digital Ohms Law Apparatus 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.
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- Ohm Meter Shunt Type (SCL-EAE-11338)
The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What does the digital Ohm's law apparatus measure?
It measures the voltage across and the current through a resistive load, so that Ohm's law can be verified and the resistance calculated.
How is resistance found in the Ohm's law experiment?
From each pair of readings using R = V/I, and more reliably from the gradient of the straight-line V-I graph.
What is the price of the Digital Ohms Law Apparatus?
Prices are not published on the website. Add the Digital Ohms Law Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11335 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Digital Ohms Law Apparatus?
Yes. Lab Exports manufactures the Digital Ohms Law Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11335.
Request a quote
Email [email protected] with the house code SCL-EAE-11335 and the quantity, or add the Digital Ohms Law Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
