A compass needle six inches long with a central pivot mount. North is painted dark blue.

Large Compass Needle

Item 296
In service Good - Normal Wear

About

9BB100 - Passive Magnetic Components
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Used in demonstrations

Oersted's experiment apparatus: copper loop on a small stand with compass needle inside, connected via black and red leads to a white DC power supply reading 01.2 V and 08.3 A, with a terminal block on the left and a hand adjusting it
Safety

Oersted's Experiment

Recreates Oersted's 1820 discovery that electric currents produce magnetic fields. A compass needle inside a current loop deflects perpendicular to the loop plane, demonstrating the right-hand rule and the fundamental …
Bernzomatic propane torch on stand heating a copper-constantan thermocouple junction, with compass needle on stand nearby and small beaker of ice water
Safety

Seebeck Effect Oersted's Experiment

Combines the Seebeck effect with Oersted's experiment: heating a copper-constantan thermocouple junction generates a current whose magnetic field flips a compass needle 180°. Demonstrates energy conversion from thermal to electrical …