The lengths of two metallic rods at temperatures θ are LA and LB and their linear coefficient of expansion are αA and αB respectively. If the difference in their lengths is to remain constant at any temperature then
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a
LALB = αAαB
b
LALB = αBαA
c
αA = αB
d
αAαB = 1
answer is B.
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Detailed Solution
Change in LA = change in LBi.e., ∆LA = LB⇒ αA∆TLA = αB∆TLBor αALA = αBLB
The lengths of two metallic rods at temperatures θ are LA and LB and their linear coefficient of expansion are αA and αB respectively. If the difference in their lengths is to remain constant at any temperature then