Question

In the _____________, an electric current sent through a junction of two dissimilar materials results in either a heating or cooling of the junction.

(a) Peltier effect

(b) See-beck effect

(c) Joule effect

(d) Thomson effect

I had been asked this question by my school principal while I was bunking the class.

My question is based upon Heat Transfer Applications in chapter Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Right answer is (a) Peltier effect

The explanation: In the Peltier effect, which is the inverse of the See-beck effect, an electric current is sent through a junction of two dissimilar materials results in either a cooling or heating of the junction. When the current flows in the direction of the potential drop of the junction, then the junction’s temperature decreases and thus has a refrigerating effect.