Question
Question: Two metal strips that constitute a thermostat must necessarily differ in their...
Two metal strips that constitute a thermostat must necessarily differ in their
A
Mass
B
Length
C
Resistivity
D
Coefficient of linear expansion
Answer
Coefficient of linear expansion
Explanation
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.