Quick Answer:The Ohm’s Law Apparatus is a simple board with an analogue ammeter and voltmeter, 4 mm brass binding posts and a printed circuit diagram, for showing that the current through a conductor is proportional to the voltage across it.
Last updated: 18 October 2026
Key Features
Two analogue meters, an ammeter and a voltmeter.
Mounting arranged for the ammeter in series and the voltmeter in parallel.
4 mm brass safety binding posts.
Circuit diagram printed on the front panel to guide wiring.
Technical Specifications
Specification
Value
Meters
Analogue ammeter and voltmeter
Circuit
Series-parallel mounting for ammeter and voltmeter
Terminals
4 mm brass safety binding posts
Panel
Printed mimic diagram
How It Is Used
The conductor under test is connected with the ammeter in series and the voltmeter across it, as shown on the panel diagram. The applied voltage is changed in steps and the readings are plotted; a straight line through the origin shows Ohm's law for that conductor.