A) brass has a higher specific heat capacity than iron
B) density of brass is more than that of iron
C) it is easier to bend an iron strip than a brass strip of the same size
D) brass has a higher coefficient of linear expansion than iron
Correct Answer: D
Solution :
Two strips of equal lengths but of differ materials (different coefficient of linear expansion) when joined together, is called bimetallic strip, and can be used in thermostat to break or make electrical contact. This strip has the characterstic property of bending heating due to unequal linear expansion or two metals. The strip will bend with metal of greater \[\alpha \]on outer side ie, convex side.
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