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A rod of initial length 2m at a temperature of 25o

A rod of initial length 2m at a temperature of 25oC is heated to 80oC. Calculate the increase in length of the rod if its linear expansivity is 4.0 x 10-3K-1

A.

0.26m

B.

0.44m

C.

0.53m

D.

0.84m

View answer & explanation

Correct answer is B

l2−l1=αl1(θ2−θ1)=4.0×10−3×2(80−25)

= 0.44m

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