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Lenz's Law – Open & closed loop
Lenz's Law – Open & closed loop (Product Code: SLE/PHY/96) is an electromagnetic induction demonstration used to show Faraday's law of induction and Lenz's law in school and college physics lessons. Passing a magnet through the complete loop makes the device move, while the split loop does not move at all, so students see that an induced current, not magnetism alone, causes the effect. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Demonstrates | Faraday's law of induction and Lenz's law |
| Loops | One complete (closed) loop and one split (open) loop |
| Closed loop | Device moves when a magnet is passed through the loop |
| Split loop | No movement at all |
| Magnet | Needed for the demonstration; confirm whether to include one when ordering |
| Product code | SLE/PHY/96 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Lenz's Law Loop Apparatus Used For?
Moving a magnet into the closed loop induces a current in it, and by Lenz's law that current sets up a magnetic field opposing the change, so the loop is pushed away from, or drawn after, the moving magnet. Repeating the action with the split loop produces no movement, because the break stops any current from circulating. This side-by-side comparison makes the apparatus an effective electromagnetic induction kit for explaining why induced currents always oppose the change that creates them.
Move the magnet smoothly, then try faster and slower passes so students can relate the size of the response to the rate of change of magnetic flux. A strong magnet gives the clearest result; keep magnets away from meters and electronic devices while the demonstration is being set up.
What to Specify When Ordering
- Number of units, for a single teacher demonstration or for group work.
- Whether a suitable strong magnet should be quoted with the apparatus.
- Delivery location for the quotation.
OEM Manufacturer
ScienceLab is the name under which Jain Scientific Equipments Private Limited trades, and the company manufactures this Lenz's law apparatus as the OEM at its own factory at Saha, Ambala, Haryana. Induction demonstrations like this go factory-direct to schools, colleges, dealers and importers, so any question about the loops or spare parts reaches the maker straight away. The ScienceLab profile tells you more about the company.
Related Physics Lab Equipment
Magnets and induction apparatus that extend this demonstration:
- Device to Verify The Lenz's Law (for high school) — aluminium rings on a pivoted rocker arm, one ring slotted, for a comparable test.
- Eddy Current Unit — a copper tube in which a falling magnet is slowed by induced currents.
- Neodymium Magnets — strong rare-earth magnets that give clear induction effects.
- Neodymium Wand — neodymium button magnets on acrylic wands for safer handling.
- Demountable Transformer Accessory Set No. 2 — a Lenz's law accessory with pendulums with and without slits.
More electromagnetism apparatus is listed under Physics Lab Equipment.
Frequently Asked Questions
What does the Lenz's Law – Open & closed loop demonstrate?
The Lenz's Law – Open & closed loop apparatus demonstrates Faraday's law of induction and Lenz's law. A magnet passed through the complete loop makes the device move, showing that an induced current creates a field opposing the change in flux.
Why does the split loop not move?
No movement at all occurs with the split loop of the Lenz's Law – Open & closed loop because the gap prevents a current from circulating. With no induced current there is no opposing magnetic field, and so no force acts on the loop.
Is a magnet included with the Lenz's law apparatus?
The Lenz's Law – Open & closed loop listing describes passing a magnet through the loops but does not confirm that a magnet is supplied. Ask us through the contact page and a suitable magnet can be added to your quotation.
Which students is the open and closed loop demonstration suited to?
The Lenz's Law – Open & closed loop suits secondary, senior secondary and undergraduate physics wherever electromagnetic induction is taught. Younger classes see a striking effect, while older students can link it to Faraday's and Lenz's laws in mathematical form.
Who manufactures the Lenz's Law – Open & closed loop?
The Lenz's Law – Open & closed loop is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM at its own factory in Ambala, Haryana, India, and is supplied direct to institutions, dealers and importers.
Can the apparatus be ordered in quantity or for export?
Yes. The Lenz's Law – Open & closed loop can be quoted individually or in quantity for schools, colleges and distributors in India and international markets. Share the quantity, any magnets needed and the destination for a complete quotation.
Request a Quote
To receive a price for the Lenz's Law – Open & closed loop, write to us through the contact page or add it to the enquiry cart. Your quotation comes directly from the manufacturer.
Last updated: 24 September 2026
