Properties Of Solids And Liquids Question 550

Question: If two rods of length L and 2L having coefficients of linear expansion α and 2α respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals :

Options:

A) 32α

B) 52α

C) 53α

D) none of these

Show Answer

Answer:

Correct Answer: C

Solution:

(3L)αeffΔθ=LαΔθ+2L(2α)(Δθ)

αeff=53α



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