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 10-6K-1]
-
A.
4mm -
B.
3mm -
C.
2mm -
D.
1mm
Correct Answer: Option B
Explanation
(I_2 – I_1 = I_1, thetaalpha – 1 times 100 times 3 times 10^{-5})
= 3 x 10-3m
= 3mm