A metal rod is heated from a temperature of 300 K to a temperature of 350 K. For which material would the change in the length of the rod be smallest?

Question

A. Aluminium

b. Copper

c. Steel

d. Lead

e. Bronze

Answer 1

Kangana,

This question is easier than it seems.

The formula being explored here is: ΔL = L (1+ α ΔT) α is what is called the "linear expansion coefficient)

You should have access to a table for the values of α for these metals.

Pick the metal with the lowest α as the ΔT is the same for each metal in this question.