Eg-1 Magnetic Field of a Large Thermoelectric Current
Aim
To demonstrate a unique application of thermoelectric currents.
Apparatus
- Thermoelectric magnet
- Bunsen burner
- Beaker of water
Thermoelectric Magnet Setup.
Description
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 becomes an electromagnet that will easily carry a load of 5 kg weight although it is magnetised by only a single current carrying loop.
The thermocouple consists of Copper-Constantan.