Question

33. A bimetallic strip of thickness 2 cm
consists of zinc and silver riveted
together. The approxi-mate radius
of curvature of the strip when
heated through 50°C will be (linear
expan-sivity of zinc and silver are
32x 10-6C and 19x 10 PC respectively)
1) 30.77 m
2) 61.54 m
3) 15.38 m
4) 7.69 m

Answer 1

Answer:

radius = r=(α1−α2)△td

where d=thickness=1cm=1×10−2m

α1=αbrass=18×10−6/oC

α2=αsteel=12×10−6/oC

Assuming change in temperature = △t=100oC

r=(6×10−6)1001×10−2r=16.67m

I hope it helps you.