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. Built at the Science Lab Supplies factory on Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, each set is sent straight from there to schools, colleges, tender contractors and distributors.
Specifications
A wave generator fed by an input-signal generator drives an elastic cord over a fixed pulley and connecting bridge, with hooked masses of 50–100 g setting the tension. Moving the bridge changes the vibrating length, and the cord supplies the mass per unit length.
| Parameter | Value |
|---|---|
| SKU | SCL-PL-11846 |
| Wave source | Wave generator with an input-signal generator |
| String | Cord or elastic thread |
| Masses | Set of masses, 50–100 g, with hook |
| Pulley and bridge | Fixed pulley and connecting bridge |
| Variables studied | String length, tension, 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.
- 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.
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 or other extras can be quoted separately.
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 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. To begin, write to us from the contact page, place the apparatus in the enquiry cart, or check the lab tender page for institutional purchasing.
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 change one variable at a time and note the loop pattern.
Is Science Lab Supplies the manufacturer or a trader?
It is the manufacturer. This apparatus is produced in the company's own works at Saha, Ambala, Haryana, so the quotation you receive is issued by the maker rather than 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 four Physics Lab items cover the same stationary-wave and resonance topics from other angles, from a Melde's arrangement and sonometers to fixed-frequency tuning forks and a vibration generator, and all of them can be listed on one quotation with this apparatus.
- Melde's String Vibration Apparatus — string vibration with an electromechanical vibrator, pulley and slotted weights.
- Sonometers — the classic apparatus for the laws of transverse vibration of strings.
- Tuning Fork Set — fixed-frequency sources for resonance work.
- Vibration Generator — a driver for string and wave demonstrations.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
