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Oersted's Law Apparatus
Oersted's Law Apparatus (Product Code: SLE/EM/22) is a demonstration apparatus used to show the magnetic effect of an electric current in secondary school physics. In this 15 cm apparatus, a permanent magnetic needle free to rotate at the centre of an aluminium frame swings as current flows over or under it in either direction, making it a compact physics demonstration kit piece. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Size | 15 cm |
| Needle | Permanent magnetic needle, free to rotate |
| Frame | Aluminium, with the needle at its centre |
| Current path | Connected so that current can flow over or under the needle, in either direction |
| Product code | SLE/EM/22 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Oersted's Law Apparatus Used For?
With no current flowing, turn the apparatus until the needle lies along the frame. Pass current along the conductor above the needle and it deflects one way; reverse the current, or route it beneath the needle instead, and the deflection reverses. Students record the four combinations in a table and use them to arrive at a rule, such as the right-hand grip rule, that links current direction to the magnetic field around a wire.
Aluminium is non-magnetic, so the frame itself does not pull the needle off line and any deflection comes from the current alone. Keep bar magnets, steel stands and other current-carrying leads away from the bench, pass current in short bursts through a key with a rheostat in series so cells are not drained, and let the needle settle before each observation.
OEM Manufacturer
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM (original equipment manufacturer) that builds this Oersted's law apparatus at its own licensed factory at Saha, Ambala, Haryana, India. School science departments, teacher-training colleges, dealers and importers buy it factory-direct. Repeat orders, or a replacement needle if one is ever needed, can be requested from the manufacturer itself; ask us. Find out more on our profile page.
Related Electricity Equipment
Useful alongside it when teaching the magnetic effect of current:
- Ampere's Rule Apparatus — maps the field around a straight wire with seven compasses.
- Oersted's Apparatus — an alternative version with a pivoted needle inside a rectangular frame.
- Holder for 'D' Dry Cells — a simple low-voltage source for the demonstration.
- Contact Key (Push Switch) — lets you pass current only while readings are taken.
- Rheostat — limits and adjusts the current through the frame.
See the rest of our Electricity Equipments category.
Frequently Asked Questions
What does the Oersted's Law Apparatus demonstrate?
The Oersted's Law Apparatus demonstrates that an electric current produces a magnetic field: the needle deflects when current flows, and the direction depends on the current's direction and on whether it passes over or under the needle.
How large is the Oersted's Law Apparatus?
The Oersted's Law Apparatus is listed as 15 cm in size, compact enough for a front-bench demonstration or for pairs of students working at their own benches during a practical period.
Why is the frame of the Oersted's Law Apparatus made of aluminium?
The frame of the Oersted's Law Apparatus is aluminium because the metal is non-magnetic: it carries the current without attracting the needle, so any deflection students see comes from the current alone.
What power source does the Oersted's Law Apparatus need?
The Oersted's Law Apparatus needs a low-voltage DC source such as a cell holder, used with a key and preferably a rheostat. A current rating is not given in our product details, so contact us for a recommended value.
Can students see the deflection reverse?
Yes. The Oersted's Law Apparatus is connected so current can be sent over or under the needle in either direction, giving four combinations for students to compare and record while deriving the rule.
Who manufactures the Oersted's Law Apparatus?
Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, is the OEM manufacturer of the Oersted's Law Apparatus, making it at its own licensed factory at Saha, Ambala, Haryana, India, for schools, colleges and dealers.
Do you supply schools in bulk and overseas?
Yes. The Oersted's Law Apparatus is supplied to schools, colleges and distributors in India and international markets; share product code SLE/EM/22, the quantity and delivery details, and the quotation comes straight from the manufacturer.
Request a Quote
For manufacturer-direct prices on the Oersted's Law Apparatus, contact us or add it to your enquiry cart.
Last updated: 24 September 2026
