Question

A refrigerator works on the principle of _________ law of thermodynamics.

• A. zeroth
• B. first
• C. second
• D. third

Answer 1

Answer: (C)

second

Second law of thermodynamics states that heat flow from high temperature object to low temperature object.

However, if we want to move the heat from low temperature to high temperature then external work has to be supplied. In refrigerator we supply work (electricity) which is used to run the compressor and heat is transferred from low temperature reservoir to high temperature reservoir.