A steel wire of length 20 cm and area of cross section 1 mm^2 is tied rigidly at both the ends. When the temperature of the wire is changed from 40^\circ\C to 20^\circC, find the change in its tension. Given, the coefficient of linear expansion for steel is 1.1\times10^{-5}K^{-1} and young's modulus of steel is 2.0\times10^11 N.m^{-2}.

AP EAMCET Engineering 21 Sep 2020 Shift 1 Paper

Section: Physics

Question : 120 of 160

Marks: +1, -0

A steel wire of length 20 cm and area of cross section 1 mm2 is tied rigidly at both the ends. When the temperature of the wire is changed from 40°C to 20°C, find the change in its tension. Given, the coefficient of linear expansion for steel is 1.1×10−5K−1 and young's modulus of steel is 2.0×1011 N.m−2.

22 N
44 N
16 N
8 N

Validate

Go to Question:

Prev Question

Next Question