Torsion Pendulum (Bridge Type)
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Product Code : EL-AM-10318
Quick answer: The Torsion Pendulum (Bridge Type) hangs its disc from a tall U-shape metal bridge, with a split chuck fitted into the disc for accurate suspension and torsion. The standard version carries a 15 cm aluminium disc. It is used to study torsional oscillation, the rigidity of the wire and the effect of moment of inertia on the period. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Component | Specification |
|---|---|
| Frame | Tall U-shape metal bridge with split chuck |
| Standard disc | Aluminium, 15 cm diameter |
| Larger version | Aluminium disc, 25 cm diameter |
| Smaller disc (larger version) | Iron, chrome plated, 10.5 cm diameter, 1.25 cm thick |
| Smallest disc (larger version) | Iron, chrome plated, approx. 8 cm diameter, 1.25 cm thick; fits the grooved area of the 25 cm disc |
How the torsion pendulum experiment is done
In the bridge type, the wire runs from the tall U-shape bridge to the split chuck in the disc, so the disc hangs within the frame. Twisted and released, it oscillates with period T = 2 pi sqrt(I/C), where I is the moment of inertia of the disc and C = pi eta r^4 / (2l) is the torsional constant of a wire of radius r and length l.
- Clamp the wire in the bridge and in the split chuck of the disc so that the disc hangs level.
- Twist the disc through a small angle and time 20 oscillations to find the period T.
- Calculate the moment of inertia of the disc from I = MR^2/2, using its measured mass M and radius R.
- Measure the length and radius of the wire and calculate eta = 8 pi I l / (r^4 T^2).
- With the larger version, place the smallest disc in the grooved area of the 25 cm disc and repeat to compare periods.
Key features
- Tall U-shape metal bridge frame for the suspension
- Split chuck fitted into the disc for accurate suspension and torsion
- Standard 15 cm aluminium disc
- Larger version with a 25 cm aluminium disc
- Chrome-plated iron discs of 10.5 cm and approx. 8 cm diameter, 1.25 cm thick, for comparative work
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the bridge type torsion pendulum 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 Applied Mechanics products
- Torsion Pendulum (EL-AM-10317)
- Torsion Apparatus Searle's Type (EL-AM-10319)
- Fly Wheel (EL-AM-10316)
- Torsion (Barton's) Apparatus Vertical Pattern (EL-AM-10320)
- Inertia Disc (EL-AM-10315)
- Bending of Beam Apparatus (EL-AM-10321)
The full range is in the Applied Mechanics section of the Physics Lab range.
Frequently asked questions
What is the standard disc on the bridge type torsion pendulum?
An aluminium disc of 15 cm diameter, suspended from the U-shape bridge through a split chuck.
Which discs come with the larger version?
The larger version has a 25 cm aluminium disc, a chrome-plated iron disc of 10.5 cm diameter and 1.25 cm thickness, and a chrome-plated iron disc of approx. 8 cm diameter that fits the grooved area of the larger disc.
What is the price of the bridge type torsion pendulum?
Prices are not published on the website. Add the bridge type torsion pendulum to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-AM-10318 and the quantity, to receive a quotation.
Does Lab Exports manufacture the bridge type torsion pendulum?
Yes. Lab Exports manufactures the bridge type torsion pendulum at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-AM-10318.
Request a quote
Email [email protected] with the house code EL-AM-10318 and the quantity, or add the bridge type torsion pendulum to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
