Induced Current Apparatus

Product Code : SCL-M-11342

Specifications

Coil winding, magnet type, current indicator, terminal type and dimensions depend on the model and are confirmed with the quotation.

How the induction experiment is done

Faraday's law states that the emf induced in a coil equals the rate of change of the magnetic flux linking it, e = -N dPhi/dt. Moving a magnet into or out of a coil changes that flux, so a current flows round a closed circuit while the motion lasts and stops when the magnet is held still. Lenz's law, the minus sign in the equation, says the induced current always opposes the change that produces it.

1. Connect the coil terminals to a sensitive centre-zero current indicator.
2. Push one pole of the magnet into the coil and note the direction and size of the deflection.
3. Hold the magnet at rest inside the coil and see the deflection fall back to zero.
4. Withdraw the magnet and note that the deflection reverses.
5. Repeat with the opposite pole, and with faster and slower movements.

Students find that the deflection grows when the magnet moves faster, that it reverses when the motion or the pole is reversed, and that no current flows without relative motion. These three observations lead directly to Faraday's and Lenz's laws.

Key features

• Shows directly that a changing magnetic flux produces an induced current.
• Relates the size of the response to the rate of change of flux, for Faraday's law.
• Shows the current reversing when the motion or magnet pole is reversed, for Lenz's law.
• Hands-on: students move the magnet or coil and see the response at once.
• Speed, direction and pole orientation can all be varied within one set-up.
• Reusable for repeated demonstrations with no consumable materials.

Documentation and supply

Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.

Lab Exports manufactures the induced current apparatus 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.

Related Magnetism products

• Tangent Galvanometer (SCL-M-11272)
• Bar Magnet - Superior (SCL-M-11248)
• Horseshoe Magnet (SCL-M-11245)
• Electromagnet "U" Shape (SCL-M-11228)
• Electric Motor Model (SCL-M-11214)
• Demountable Transformer (SCL-M-11210)

The full range is in the Magnetism section of the Physics Lab range.

Frequently asked questions

What does the induced current apparatus demonstrate?

It demonstrates electromagnetic induction: a current is induced in the coil only while the magnetic flux through it is changing, and its direction reverses when the motion or the magnet pole is reversed.

Which laws can be taught with it?

Faraday's law, which links the induced emf to the rate of change of flux, and Lenz's law, which gives the direction of the induced current.

What is the price of the induced current apparatus?

Prices are not published on the website. Add the induced current apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-M-11342 and the quantity, to receive a quotation.

Does Lab Exports manufacture the induced current apparatus?

Yes. Lab Exports manufactures the induced current apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-M-11342.

Request a quote

Email [email protected] with the house code SCL-M-11342 and the quantity, or add the induced current apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.