Apparatus for Investigating the Change of Frequency of Stationary Waves in a string / String with Length, Voltage and Mass Per Unit of String / String Length.
Product Code : SCL-PL-11846
Apparatus for Investigating the Change of Frequency of Stationary Waves in a string / String with Length, Voltage and Mass Per Unit of String / String Length. (SKU SCL-PL-11846) is a string-wave set in which a wave generator drives a cord running over a fixed pulley, so students can form stationary waves and see how their frequency depends on vibrating length, tension and mass per unit length. It suits senior secondary and college wave practicals. Science Lab Supplies makes this string-wave set in its own factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and quotes it directly to schools, colleges, tender contractors and distributors.
Specifications
Each part of the stationary-wave set has its own row in the table below. In short, a wave generator fed by an input-signal generator drives an elastic cord over a fixed pulley and connecting bridge, while hooked 50–100 g masses set the tension and the bridge position sets the vibrating length.
| Specification | Value |
|---|---|
| SKU | SCL-PL-11846 |
| Wave source | Generator for the production of waves |
| Signal source | Generator of the input signal |
| String | Cord or elastic thread |
| Masses | Set of masses, 50–100 g |
| Mass fitting | Hook |
| Pulley | Fixed pulley |
| Bridge | Connecting bridge |
| Variables studied | String length, tension and mass per unit length |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Stationary Waves in a String Apparatus
The apparatus sets up standing waves on a stretched cord and lets students measure how the frequency of each mode changes with vibrating length, tension and linear mass density. As school physics lab equipment in India, it supports the waves topic of Class 11 physics, B.Sc. oscillations and waves practicals, and physics labs in polytechnics and engineering colleges.
- Class 11 physics: locating nodes and antinodes and counting loops for the first few harmonics, then contrasting these standing waves with the travelling pulses of the Apparatus for Demonstrating Waves with Elastic Springs.
- Adding masses to the hook to show that frequency rises with the square root of tension.
- B.Sc. practical: relating resonance readings to the cord's mass per unit length and the wave-speed relation, with each vibrating length read on a Wooden Ruler 1 Metre graduated in centimetres and millimetres.
Standard Scope of Supply
Each set comprises the wave generator, the input-signal generator, the cord or elastic thread, the hooked 50–100 g masses, the fixed pulley and the connecting bridge. A metre rule, extra masses or a spare cord can be added to the same quotation if the laboratory needs them.
Packing, MOQ and Lead Time
Quotations can cover a single apparatus or enough sets for every bench in a physics laboratory, and each one sets out the packing, delivery time and price for that exact quantity. Other wave items, such as tuning forks or a signal generator, can join the same quotation.
Holding an Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Nepal, Bangladesh, Zambia, Rwanda, South Africa and Qatar. Questions about this apparatus can go through the contact page; the enquiry cart collects it with other wave items, and the lab tender page explains institutional bids.
Frequently Asked Questions
What does this string-wave apparatus measure?
It shows how the frequency of stationary waves on a string depends on vibrating length, tension and mass per unit length. Students can change one variable at a time and note the loop pattern.
Is Science Lab Supplies the manufacturer or a trader?
The string-wave set comes from the company's own factory at Saha, Ambala, Haryana, where it is manufactured, so every quotation for it is issued by the maker and not by a reseller.
Can this apparatus be quoted for a college or school tender?
Yes. Send the quantity, delivery location and tender specification, and an item-wise quotation will be prepared against the specification shown above, including the hooked 50–100 g masses.
Related Wave and String Apparatus
These seven Physics Lab items extend the same stationary-wave and resonance work: two more string-vibration set-ups, a fork set, two wave drivers, a wave package and a bench signal source. Any of them can be listed on one quotation with this apparatus for a complete wave bench.
- Melde's String Vibration Apparatus — electromechanical vibrator run on 6–12 V AC, with a table-clamp pulley and slotted weight set.
- Sonometers — wooden sonometer with a 60 cm resonance box, three movable bridges and steel cords of 0.4 and 0.8 mm.
- Tuning Fork Set — two 256 Hz forks and one each of 320, 426.7 and 480 Hz on a wooden resonance box, with a striker.
- Vibration Generator — coil inside a cylindrical permanent-magnet field, maximum input 6 V/1 A, driven by a function generator.
- Electromagnetic Driver for Sonometer — soft iron pole piece and copper coil that drive a steel wire without contact, with 4 mm sockets.
- Mechanical-Wave Apparatus Package — cord for transverse waves, mechanical wave driver and a sine-wave generator covering 1–400 Hz in 1 Hz steps.
- Bench Signal Generator — sine and square waves from 5 Hz to 50 kHz in four switched ranges, up to 8 V peak to peak.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 22 October 2026
