Heat and Thermal ExpansionHard
Question
A fine wire of length 4m is fixed rigidly in a heavy in a brass frame as shown in figure. It is just taut at 20oC. The tensile stress developed in steel wire if whole system is heated to 120oC is :-
(αbrass = 1.8 × 10-5 oC-1, αsteel = 1.2 × 10-5 oC-1, Ysteel = 2 × 1011 Nm-2, Ybrass = 1.7 × 107 Nm-2)
(αbrass = 1.8 × 10-5 oC-1, αsteel = 1.2 × 10-5 oC-1, Ysteel = 2 × 1011 Nm-2, Ybrass = 1.7 × 107 Nm-2)
Options
A.1.02 × 104 Nm-2
B.1.2 × 108 Nm-2
C.1.2 × 106 Nm-2
D.6 × 108 Nm-2
Solution
Stress = Y (strain) YS (αbαs) ᐃT = (2 × 1011) (0.6 × 10-5) (100) = 1.2 × 108 Nm-2
Create a free account to view solution
View Solution FreeMore Heat and Thermal Expansion Questions
The figure a system of two constrict spheres of radii r1 and r2 and kept at temperatures T1 and T2, respectively. the ra...A ring consisting of two parts ADB and ACB of same conducting k carries an amount of heat H. The ADB part is now replace...Two wires are made of the same material and have the same volume. However wire 1 has crosssectional area A and wire-2 ha...Two long, thin solid cylinders are evidential in size, but they are of different substances with two different thermal c...Bars of two different metals are bolted together, as shown in figure. The distance x does not change with temperature if...