A metal rod of length 100cm is heated through 100ºC, calculate the change in length of the rod [linear expansivity of the material of the rod is 3 x 10\(^{-5}\)K\(^{-1}\)]
A
4mm
B
3mm
C
2mm
D
1mm
Verified Correct Answer: B.
Physical Principles & Numerical Solution
\(I_2 - I_1 = I_1 \times \theta \times \alpha = 1 \times 100 \times 3 \times 10^{-5}\)
= 3 x 10\(^{-3}\)m
= 3mm
Source: Myschool Past Questions Archive (Record #34210)