Question

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 strip goes up by `DeltaT`and the strip bends to from an arc of radius of curvature R. Then R is.
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 1

Correct Answer - B::D
The expression of radius of curvature `R` is
`R=(d)/((alpha_(1)-alpha_(2))Deltat)`
Thus, `Rprop(1)/(Deltat)` and `Rprop(1)/(|alpha_(B)-alpha_(C)|)`