This apparatus is designed to demonstrate Ohms Law. Consisting of a sheet metal enclosure with milliammeter, voltmeter, rheostat, push key and terminal posts..
Simply connect an external battery and a suitable resistance to the terminal posts, then press the push key. Readings are taken from the milliammeter and voltmeter and the resistance is calculated using Ohms Law.

* Current flow controlled through circuit by rheostat
* Colour coded connection terminals
* Scratch resistant enclosure
* Circuit diagram printed on enclosure to aid understanding