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Barlows Wheel Apparatus Manufacturer,Supplier and Exporter

Barlows Wheel Apparatus

Product Code : SEL-PLE-10196

Quick Answer: Barlow's wheel shows electric energy being converted into mechanical energy: a 9 cm star-shaped copper disc dips into a mercury trough between the poles of a small horseshoe magnet and spins when current flows, at 4 volts and 1.8 amps.

Last updated: October 2026

Key Features

  • Star-shaped copper disc, 9 cm diameter, rotating vertically on a pair of adjustable centres
  • Disc dips into a mercury trough between the limbs of a small horseshoe magnet
  • Wood base 15 x 10 cm with two terminals
  • Disc pillar connected to one terminal, mercury trough to the other
  • Operates on 4 volts, taking 1.8 amps
  • Supplied without battery

Technical Specifications

SpecificationValue
DiscStar-shaped copper, 9 cm diameter
MagnetSmall horseshoe magnet
ContactMercury trough
BaseWood, 15 x 10 cm
Operating supply4 volts, 1.8 amps
BatteryNot included

About This Product

Current enters through the metal pillar, flows down the spoke of the disc that is touching the mercury, and leaves through the trough. Because that spoke sits in the field of the horseshoe magnet, it is pushed sideways and the wheel turns, an early form of electric motor. The disc can be adjusted vertically on its metal pillar so that its points dip into the mercury. The Barlows Wheel Apparatus can be packed for export to Honduras, Peru, Vanuatu, Zambia and Morocco.

Frequently Asked Questions

What supply does the Barlow's wheel need?

It operates on 4 volts, at which it takes 1.8 amps. The apparatus is supplied without a battery.

How is the electrical contact made to the rotating disc?

The disc is mounted on a metal pillar connected to one terminal, and its points dip into a mercury trough connected to the other terminal.

Related: Physics Lab Equipment, Fleming Apparatus, Electric Motor Model with Newton Colour Disc, Dynamo Working Model.

For a quotation on the Barlows Wheel Apparatus, contact School Educational Instrument.

   
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