Electrical Transformer
Product Code : SCL-EAE-11122
Quick answer: The Electrical Transformer is a single demonstration unit for teaching how a transformer works: an alternating current in the primary coil sets up a changing magnetic field that induces an EMF in the secondary coil. Students use it to identify the windings and relate input and output voltages to the turns ratio. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Format | Single educational demonstration unit |
| Principle | Electromagnetic induction and mutual induction |
| Concepts covered | Primary coil, secondary coil, AC voltage transformation, induced EMF, turns ratio |
For electrical ratings, coil configuration and core details, email [email protected] with the house code SCL-EAE-11122.
How the transformer is used in teaching
A transformer has two coils linked by a magnetic core. An alternating current in the primary coil produces a magnetic flux that keeps changing, and this changing flux induces an alternating EMF in the secondary coil; this is mutual induction. For an ideal transformer the voltages follow the turns ratio, Vs/Vp = Ns/Np, so a secondary with more turns than the primary steps the voltage up and one with fewer turns steps it down.
The demonstration also shows why a transformer needs AC: a steady direct current gives a constant flux, and a constant flux induces no EMF in the secondary. With ideal behaviour the power in and out are equal, Vp x Ip = Vs x Is, so stepping the voltage up steps the current down.
- Place the unit on a clean, dry, stable bench and identify the primary and secondary terminals.
- With the supply switched off, connect the primary to a suitable low-voltage AC supply.
- Connect an AC voltmeter across the secondary terminals, then switch on.
- Record the primary and secondary voltages and compare their ratio with the turns ratio of the windings.
Key features
- Single demonstration unit showing energy transfer between primary and secondary coils.
- Illustrates electromagnetic and mutual induction in a form students can measure.
- Supports study of input and output AC voltages and the turns ratio.
- Helps students identify and compare transformer windings.
- Suited to supervised school demonstrations and college practicals.
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the electrical transformer at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
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The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What does the electrical transformer demonstrate?
It demonstrates mutual induction: an alternating current in the primary coil induces an EMF in the secondary coil, and the voltage ratio follows the turns ratio of the coils.
Why does a transformer not work on DC?
A steady direct current produces a constant magnetic flux, and only a changing flux induces an EMF in the secondary coil, so a transformer needs an alternating supply.
What is the price of the electrical transformer?
Prices are not published on the website. Add the electrical transformer to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11122 and the quantity, to receive a quotation.
Does Lab Exports manufacture the electrical transformer?
Yes. Lab Exports manufactures the electrical transformer at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11122.
Request a quote
Email [email protected] with the house code SCL-EAE-11122 and the quantity, or add the electrical transformer to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
