Magnetic Field Demo, Round Coil
Product Code : LSK-PL-10370
Magnetic Field Demo, Round Coil (SKU LSK-PL-10370) is a magnetic field demonstrator built around a round coil. With current flowing, it produces the field pattern of two conductors passing through a surface, current going up in one and down in the other. It serves school and college lessons on the magnetic effect of current. The coil is built in the Science Lab Supplies manufacturing unit at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and schools, colleges, tender contractors and distributors buy it from the factory direct.
Specifications
The table below breaks the round-coil demonstrator down into its individual features. In short, it is a round coil passing through a flat surface, so the field around its two sides, which carry current in opposite directions, can be mapped there with mini plotting compasses or with fine iron filings when the surface is tapped.
| Specification | Value |
|---|---|
| SKU | LSK-PL-10370 |
| Type | Magnetic field demonstrator |
| Conductor | Round coil passing through a surface |
| Field pattern shown | Two conductors through a surface, current up in one and down in the other |
| Designed for use with | Mini plotting compasses |
| Alternative method | Fine iron filings, with the surface tapped to vibrate the particles |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Round Coil Magnetic Field Demo
The round coil lets students see that current in a loop creates a magnetic field whose lines circle each side of the wire and run almost straight through the centre. It fits the magnetic effects of current chapter in CBSE Class 10 science and the moving charges and magnetism chapter of Class 12 physics.
- Class 10 science: field pattern of a current-carrying circular loop, mapped point by point with a 16 mm Plotting Compass.
- Class 12 physics: linking the observed pattern to the field on the axis of a circular coil.
- Showing the whole pattern at once with iron filings, then comparing it with the field of a bar magnet using the Pair of Bar Magnets with Iron Filings.
Standard Scope of Supply
The Magnetic Field Demo, Round Coil is supplied as a single unit as described above. Mini plotting compasses or fine iron filings, which the coil is designed to be used with, can be added to the same quotation if your laboratory does not already stock them.
Packing, MOQ and Lead Time
Ask for one demonstrator for the teacher's bench or several for group work. Science Lab Supplies prepares a quotation that states packing, delivery time and price for the number you need, and electricity and magnetism lab kits for schools, such as compasses and magnets, can be quoted alongside.
Science Lab Supplies is a registered exporter holding an Importer-Exporter Code and is able to ship to buyers in Oman, the Philippines, Nepal, Bangladesh, Zambia and Rwanda. Tell us how many coils your magnetism lessons need via the contact page or by adding the item to the enquiry cart; institutions buying by bid will find the process on the lab tender page.
Frequently Asked Questions
What field pattern does the round coil show?
It shows the pattern of two conductors passing through a surface with current going up in one and down in the other, which is how the two sides of a circular loop appear on a flat sheet.
Do I need plotting compasses or iron filings?
The unit is designed for mini plotting compasses. Fine iron filings can also be used; tap the surface gently so the particles vibrate and settle along the field lines.
Is Science Lab Supplies the manufacturer or a trader?
This coil demonstrator is a product of the company's own factory in the HSIIDC Industrial Area of Saha, Ambala, India, so Science Lab Supplies acts as its manufacturer, and every quotation is issued by the producer without a trading house in between.
Can it be included in a school laboratory tender?
Yes. Share the tender quantity and specification, and the item-wise quotation will list this coil with the other physics items you require, together with packing and delivery time.
Related Electricity and Magnetism Equipment
Field-mapping lessons need compasses, magnets, other conductor shapes and a link to induction. These items from the Physics Lab and Magnetism Physics ranges complement the round coil, cover permanent-magnet and electromagnet work, and can all share one quotation with it.
- Magnetic Field Demonstration Device — circular coil and straight conductor sets, a 16 mm aluminium compass and 500 mg of iron filings.
- Magnetic Needle — two-tone needle on a sharp steel pivot above an aluminium base, turning in a horizontal plane.
- Apparatus for Demonstrating Magnetic Field Lines that Creates a — 220 V / 50 Hz coil, 500 g of iron filings, magnetic rod and wooden disk.
- Earth Magnetic-Field Study Set — bar and horseshoe magnets, a magnetic globe and 20 freely movable compasses.
- Electromagnet Set — electromagnet with cross rod, nine hooked masses and a D-cell battery holder.
- Bar Magnet Pair Chrome Steel — 75 x 12 x 5 mm red and blue chrome steel magnets with keepers.
- Apparatus for Studying the Production of Electricity by Induction — 700-turn and 1150-turn coils with a 30-0-30 galvanometer.
Browse the full Physics Lab range, the Magnetism Physics range, or all physics lab equipment.
Last updated: 22 October 2026
