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why heat produced at junction of two different conductor.
what care should be taken to minimize it.
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Answer Posted / ashwin
The two dissimilar metals behave or contribute a thermocouple. A thermocouple is a junction between two dissimilar metals when subjected to heat generates voltage. This is seebeck effect. The inverse of this effect is Peltier effect. When current is passed through a junction containing two dissimilar metals heat is generated.
For more details on the principle of thermocouple go to link below:
http://en.wikipedia.org/wiki/Thermocouple
From the above link if you can reverse the effects or its causative factors you can minimize this effect.
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