Solution:
l1 = 1cm, l2 = 1.02cm ; t = 100oC
we have
A wire of length 60 cm is bent into a circle with a gap of 1 cm at its ends. On heating it by 100°C, the length of the gap increases to 1.02 cm. of material of wire is
l1 = 1cm, l2 = 1.02cm ; t = 100oC
we have