Which of the following statements is correct?

Both Peltier and Joule effects are reversible Both Peltier and Joule effects are irreversible Joule effect is reversible and Peltier effect is irreversible Joule effect is irreversible and Peltier effect is reversible

Joule effect is irreversible and Peltier effect is reversible

The Joule effect occurs for current flowing through a conductor and impacts its dimensions. It is an irreversible process. On the other hand, the Peltier effect is when current flows across the junctions of a Thermocouple, heat is generated (evolved) or absorbed i.e the junction gets either heated or cooled according to direction of current..