Properties Of Solids And Liquids Question 101
Question: Two metal strips that constitute a thermostat must necessarily differ in their [IIT-JEE 1992]
Options:
A) Mass
B) Length
C) Resistivity
D) Coefficient of linear expansion
Show Answer
Answer:
Correct Answer: D
Solution:
Thermostat is used in electric apparatus like refrigerator, Iron etc for automatic cut off.
Therefore for metallic strips to bend on heating their coefficient of linear expansion should be different.
