Coefficient of linear expansion of brass and steel rods are α1 and α2. Lengths of brass and steel rods are l1 and l2 respectively. If (l2 – l1) is maintained same at all temperatures, which one of the following relations holds good?
A. α12l2 = α22l1
B. α1l1 = α2l2
C. α1l2 = α2l1
D. α1l22 = α2l12
Answer:B
Coefficient of linear expansion of brass and steel rods are α1 and α2. Lengths of brass and steel rods are l1 and l2 respectively. If (l2 – l1) is maintained same at all temperatures, which one of the following relations holds good?
A. α12l2 = α22l1 B. α1l1 = α2l2 C. α1l2 = α2l1 D. α1l22 = α2l12