NEET Physics Mechanical Properties Of Solids Youngs Modules MCQs

Consider an iron rod of length $1{\rm{ }}m$ and cross-section ${\rm{1}}\,\,{\rm{c}}{{\rm{m}}^2}$ with a Young’s modulus of ${10^{12}}$ dyne ${\rm{c}}{{\rm{m}}^{ - 2}}$. We wish to calculate the force with which the two ends must be pulled to produce an elongation of $1{\rm{ }}mm$. It is equal to

Consider an iron rod of length $1{\rm{ }}m$ and cross-section ${\rm{1}}\,\,{\rm{c}}{{\rm{m}}^2}$ with a Young’s modulus of ${10^{12}}$ dyne ${\rm{c}}{{\rm{m}}^{ - 2}}$. We wish to calculate the force with which the two ends must be pulled to produce an elongation of $1{\rm{ }}mm$. It is equal to

A rod is fixed between two points at ${20^0}C$. The coefficient of linear expansion of material of rod is $1.1\,\, imes {10^{ - 5}}{/^0}C$ and Young’s modulus is $1.2\,\, imes {10^{11}}N/{m^2}$. Find the stress developed in the rod if temperature of rod becomes ${10^0}C$

A rod is fixed between two points at ${20^0}C$. The coefficient of linear expansion of material of rod is $1.1\,\, imes {10^{ - 5}}{/^0}C$ and Young’s modulus is $1.2\,\, imes {10^{11}}N/{m^2}$. Find the stress developed in the rod if temperature of rod becomes ${10^0}C$

A steel wire is stretched with a definite load. If the Young’s modulus of the wire is $Y$. For decreasing the value of $Y$

A steel wire is stretched with a definite load. If the Young’s modulus of the wire is $Y$. For decreasing the value of $Y$

A uniform wire, fixed at its upper end, hangs vertically and supports a weight at its lower end. If its radius is $r$, its length $L$ and the Young’s modulus for the material of the wire is $E$, the extension is 1. directly proportional to $E$

2. inversely proportional to $r$

3. directly proportional to $L$

A uniform wire, fixed at its upper end, hangs vertically and supports a weight at its lower end. If its radius is $r$, its length $L$ and the Young’s modulus for the material of the wire is $E$, the extension is 1. directly proportional to $E$

2. inversely proportional to $r$

3. directly proportional to $L$

When a weight of $5\,\,kg$ is suspended from a copper wire of length $30\,\,m$ and diameter $0.5\,\,mm$, the length of the wire increases by $2.4\,\,cm$. If the diameter is doubled, the extension produced is

When a weight of $5\,\,kg$ is suspended from a copper wire of length $30\,\,m$ and diameter $0.5\,\,mm$, the length of the wire increases by $2.4\,\,cm$. If the diameter is doubled, the extension produced is