Ring Thrower Manufacturer,Supplier and Exporter in India

Ring Thrower (Product Code: SLE/EM/09) is a teacher-operated demonstration of electromagnetic induction that ends with an aluminium ring shooting up to 12 ft into the air. The ring rests over a coil of wire wound on an iron core. When the coil is energised with alternating current, its changing magnetic field induces an electromotive force (EMF) in the ring; the resulting current sets up an opposing magnetic field, and the repulsion propels the ring upward — Faraday’s law and Lenz’s law in a single, visible event. Manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, it is an electromagnetic induction kit that needs no assembly: it is ready to use as soon as it is plugged into a wall socket.

Specifications

Typical Use

The ring thrower is usually introduced after students have met induction with a magnet and coil, because it turns an abstract rule into something they can watch and hear. With the ring on the core, a short burst of current launches it; the teacher can then ask why an aluminium ring, which is not attracted to a magnet, is pushed away so strongly. Holding the ring down on the core for a moment and then letting go shows that the induced current also warms the metal, a direct link to eddy-current heating. Discussing why a ring with a gap cut in it would not fly helps students see that a closed conducting loop is needed for the induced current to flow.

Keep faces and hands clear of the space above the core, check that nothing overhead is in the ring’s path, and energise the coil only in brief bursts so it does not overheat. The unit belongs with the physics lab equipment India’s senior secondary and undergraduate teachers use for electromagnetic induction, transformers and AC topics.

Manufacturer

The Ring Thrower is made under the ScienceLab brand by Jain Scientific Equipments Private Limited, an Ambala, Haryana manufacturer of physics and general science teaching apparatus. Learn more on our company profile page.

Related Electricity Equipment

Apparatus for the rest of an induction and transformer lesson:

• Primary-Secondary Coils — iron-cored coils with several secondary windings for measuring induction and turns ratio
• Primary and Secondary Coil Set — nested coils with binding posts and a soft iron core for mutual induction
• Demountable Transformer Kit — a laminated core with interchangeable coils for step-up and step-down work
• Apparatus for Studying the Production of Electricity by Induction — a follow-on set for student induction measurements

Explore the full Electricity Equipments range for more electromagnetism demonstrations.

Frequently Asked Questions

What power supply does the Ring Thrower need?
It plugs directly into a wall socket; no separate supply is required. The listed rating is 115-V AC, 60 Hz, so please contact us to confirm the version that matches your local mains before ordering.

How high does the ring go?
The aluminium ring can be propelled up to 12 ft, so use it in a room with adequate ceiling clearance.

Why is the ring made of aluminium?
Aluminium is a good electrical conductor and light in weight, so a strong induced current and a large repulsive force act on a small mass.

Does it work with direct current?
No. The effect depends on a changing magnetic field, which is why the coil is energised with alternating current.

Can students operate it?
It is best run by the teacher as a demonstration, with students observing from a safe distance.

Are spare rings available?
Please ask through the contact page and we will advise on replacement parts.

Do you supply institutions and export customers?
Yes. We supply schools, colleges and distributors in India and international markets.

Request a Quote

For a price on the Ring Thrower, write to us via the contact page or add it to the enquiry cart along with other induction apparatus.

Last updated: 24 September 2026