Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
-
A.
1:2 -
B.
2:1 -
C.
8:9 -
D.
9:8
Correct Answer: Option A
Explanation
P: (frac{alpha h theta}{alpha h theta})
(frac{2 times 3 times theta}{3 times 4 times theta})
(frac{1}{2})