1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

A wire is stretched to double of its length. The strain is

A
1
B
2
C
3
D
4
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The Poisson's ratio of a material is 0.1. If the longitudinal strain of a rod of this material is $$10^{-3}$$, then the percentage change in the volume of the rod will be

A
0.008%
B
0.08%
C
0.8%
D
8%
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A steel wire of length 4.7 m and cross-sectional area $$3.0\times10^{-5}$$ m$$^2$$ stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of $$4.0\times10^{-5}~\mathrm{m^2}$$ under a given load. What is the ratio of Young's modulus of steel to that of copper?

A
1.8 : 1
B
2.8 : 1
C
3.8 : 1
D
4.8 : 1
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