I just came across Seebeck effect and Inverse Seebeck effect. It says that when electric current is passed through or if electric voltage is applied between a Seebeck couple heat is dissipated at one end and absorbed at the other. By assuming that heat dissipation refers to heating and heat absorption referring to cooling (I even doubts whether heat dissipation is heating or cooling) how can a material cool when current is passed through it. I also want to which type of electric current is passed AC or DC. Thank You.