A bimetallic strip is formed out of two identical strips one of copper and the other of brass. The co-efficients of linear expansion of the two metals are `alpha_(C)` and `alpha_(B)`. On heating, the the strip bends to form an are of radius of curvature `R`. Then `R` is

Options

A. Proportional to `DeltaT`
B. Inversely proportional to `DeltaT`
C. Proportional to `|alpha_(B)-alpha_(C)|`
D. inversely proportional to `|alpha_(B)-alpha_(C)|`

Answer

BD

Explanation

The expression of radius of curvature R is `R=(d)/((alpha_(1)-alpha_(2))Deltat)`
Thus , `Rprop(1)/(DeltaT)andRprop(1)/(|alpha_(B)-alpha_(C)|)`.