Bell Jar With Battery Buzzer Manufacturer,Supplier and Exporter in India
Product Code : EL-P-10808
Quick Answer: The Bell Jar With Battery Buzzer demonstrates that sound cannot travel without air, using a battery-operated buzzer housed inside an acrylic tube. The listed size is 14 cm high and 10 cm in diameter.
Last updated: October 2026
Key Features
- Shows that without air or matter, sound waves cannot travel and cannot be heard
- Battery-operated buzzer housed inside an acrylic tube
- With the buzzer beneath the jar and a vacuum seal created, students observe a total absence of sound
- When air is returned to the chamber, the buzzer can be heard again
- Listed size: height 14 cm, 10 cm diameter
Technical Specifications
| Specification | Value |
|---|---|
| Buzzer | Battery operated, housed inside an acrylic tube |
| Height | 14 cm |
| Diameter | 10 cm |
| Demonstrates | Sound needs air or matter to travel |
About This Product
The bell jar and buzzer is a classic demonstration that sound is a mechanical wave and needs a medium. The buzzer is placed under the jar and the air is removed to create a vacuum seal, and the sound fades away although the buzzer is still working. When air is let back in, the sound returns. Students can discuss why sound cannot cross empty space, in contrast to light.
Frequently Asked Questions
Q1. What does the Bell Jar With Battery Buzzer demonstrate?
It demonstrates that without air or matter, sound waves cannot travel and therefore cannot be heard.
Q2. What do students observe when the vacuum seal is created?
With the buzzer beneath the jar and a vacuum seal created in the chamber, students observe a total absence of sound. The sound returns once air is returned.
Q3. What size is it?
The listed size is height 14 cm and 10 cm diameter.
Related: Physics Teaching Aids, Compact Sound Meter, Cloud Bottle, Kinetic Theory Model.
For a quotation on the Bell Jar With Battery Buzzer, contact School Lab Equipment India.