Young’s Modulus Apparatus

Product Code : SCL-EAST-11178

Specifications

The extension-reading method of this version, vernier or micrometer, can be confirmed with [email protected].

How the Young's modulus experiment is done

When a wire is pulled by a force F, the stress is F/A, the force per unit cross-sectional area, and the strain is l/L, the extension divided by the original length. Within the elastic limit the two are proportional, and their ratio is Young's modulus, Y = stress/strain = FL/(A l). For a wire of radius r carrying a load of mass M, this becomes Y = MgL/(pi r^2 l).

Typical values are large, around 200 GPa for steel, so the extension of a metre-long wire is only a fraction of a millimetre per kilogram. The experiment therefore depends on careful measurement: the diameter is taken at several points with a screw gauge, and the load is added and removed in equal steps so that loading and unloading readings can be averaged.

1. Clamp the test wire in the holder and hang the load weight on the suspension hook to straighten it.
2. Measure the original length L of the wire and its diameter at several points.
3. Note the initial reading of the extension-measuring arrangement.
4. Increase the load in equal steps, recording the extension each time, then unload in the same steps.
5. Plot load against extension, check that the line is straight, and use its slope to calculate Y.

Beyond the elastic limit the wire no longer returns to its original length; readings that fail to repeat on unloading show that the load has been too great.

Key features

• Rigid experimental frame for consistent positioning of the test wire
• Wire holder and clamping assembly grips the wire securely
• Load weight with suspension hook for progressive loading
• Adjustment and fastening accessories for setting up the arrangement
• Links stress, strain and elastic modulus with measured values

What is included

• Experimental frame assembly
• Load weight with suspension hook
• Wire holder and clamping assembly
• Adjustment and fastening accessories

Documentation and supply

Most Lab Exports products carry a one-year manufacturer warranty.

Lab Exports manufactures the Young's Modulus 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.

Related Elasticity and Surface Tension products

• Steel Wire (100gm) (SCL-EAST-11219)
• Viscometer Searle's Pattern (EL-EAST-10422)
• Viscosity Apparatus Stokes Method (EL-EAST-10421)
• Surface Tension Apparatus (EL-EAST-10420)
• Searle's Surface Tension Balance (EL-EAST-10419)
• Quincke's Surface Tension Apparatus (EL-EAST-10418)

The full range is in the Elasticity and Surface Tension section of the Physics Lab range.

Frequently asked questions

What does the Young's modulus apparatus measure?

The Young's modulus of a test wire, from the extension produced by a known tensile load and the wire's original length and diameter.

What is the elastic limit?

It is the greatest stress a material can take and still return to its original length when the load is removed. Young's modulus is measured only below this limit.

What is the price of the Young's Modulus Apparatus?

Prices are not published on the website. Add the Young's Modulus Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAST-11178 and the quantity, to receive a quotation.

Does Lab Exports manufacture the Young's Modulus Apparatus?

Yes. Lab Exports manufactures the Young's Modulus Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAST-11178.

Request a quote

Email [email protected] with the house code SCL-EAST-11178 and the quantity, or add the Young's Modulus Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.