Peltier effect and its explanation

• Peltier effect is converse of Seebeck effect.
• When a current is passed across the junctions of two dissimilar metals, then heat is evolved at one junction and heat is absorbed at another junction. This effect is called Peltier effect.
• Peltier effect is reversible where as Joule's heat effect is irreversible
• The amount of heat evolved or absorbed at junctions is called Peltier coefficient.