Eg-1 Magnetic Field of a Large Thermoelectric Current
Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011
To demonstrate a unique application of thermoelectric currents.
- Thermoelectric magnet
- Bunsen burner
- Beaker of water
Click on pictures to enlarge.
A thermocouple that will produce currents of approximately 100 Amperes in a very low resistance circuit ( ~ 0.0001 ohms) if one end is cooled and the other heated over a bunsen burner.
This current can be demonstrated by its magnetic effects; a soft iron block with polished contact surfaces surrounding the thermocouple becomesan electromagnet that will easily carry a load of 5 kgwt although it is magnetised by only a single current carrying loop.
The thermocouple consists of Copper-Constantan.