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A bimetallic strip is formed out of two identical strips, One of copper and the other of brass. The coefficients of linear expansion of the two metals are $ \alpha _C$ and $\alpha_{B}.$ On heating, the temperature of the strips increases by $\Delta T$ and the strip bend to from an arc of radius R. Then R is proportional to :

\[\begin {array} {1 1} (1)\;\Delta \;T & \quad (2)\;\frac{1}{\Delta T} \\ (3)\;\sqrt {\Delta T} & \quad (4)\;\frac{1}{\sqrt {\Delta T}}\end {array}\]

1 Answer

$ (2)\;\frac{1}{\Delta T}$
answered Nov 7, 2013 by pady_1

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