Peltier And Joules Heating Effects

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Peltier And Joule’s Heating Effects

                  Peltier Effect                  Joules Heating Effect
1. H = ≠ πt.

2. Heat produced is directly pro-portional to currnet.

3. It is reversible because evolution or absorption of heat are inter-changed when the direction of current is reversed.

4. Heating and cooling both occurs.

5. Heating or cooling due to this effect takes place only at the junction of thermo-couple.		    H = i2Rt.
 
Heat produced is directly porportional to the square of the current

 Heat produced across any part of the conductor remains the same even when the direction fo current is reversed.

Only heating takes place.

Heating due to this effect occurs throughout the conducotr.


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