Question

10. The difference between Joule effect and Peltier effect is/are : (A) In Joule effect there is always heating but Peltier effect produces both heating and cooling (B) Joule heating is proportional to square of current but in Peltier effect, the heating i proportional to current (C) Joule heating is irreversible but Peltier effect is reversible (D) All of the above​

Answer 1

Answer:

peltier effect is thermally reversible. Joule's effect is thermally irreversible. ... the heat absorbed or liberated at a junction is found to be proportional to the first power of current where as in Joule effect that is proportional to the square of current