A bimetallic is made of two strips A and B having coefficients of linear expansion αA and αB. If αA < αB , then on heating, the strip will
As αA < αB , Strip B will expand more than A, therefore, strip will bend and B will appear on outer side.
A bimetallic strip is formed out of two identical strips, one of copper and other of brass. The coefficients of linear expansion of the two metals are αC and (\alpha_B\) . On heating, the temperature of the strip goes up by DT and the strip bends to form an arc of radius of curvature R. Then R is