Questions in Mechanical Properties of Solids

Select	Question
	The longitudinal strain is only possible in
	If the density of the material increases, the value of Young's modulus
	Young's modulus of rubber is ${{10}^{4}}\,N/{{m}^{2}}$ and area of cross-section is $2\,c{{m}^{2}}$. If force of $2\times {{10}^{5}}$dynes is applied along its length, then its initial length $l$ becomes
	The elastic limit for a gas
	If Young's modulus for a material is zero, then the state of material should be
	Liquids have no Poisson's ratio, because
	A wire of length $L$ and radius $r$ is rigidly fixed at one end. On stretching the other end of the wire with a force $F$, the increase in its length is $l$. If another wire of same material but of length $2L$ and radius $2r$ is stretched with a force of $2F$, the increase in its length will be
	In steel, the Young's modulus and the strain at the breaking point are $2\times {{10}^{11}}\,N{{m}^{-2}}$ and 0.15 respectively. The stress at the breaking point for steel is therefore
	Which of the following statements is correct
	The force required to stretch a steel wire of $1\,c{{m}^{2}}$ cross-section to $1.1$ times its length would be $(Y=2\times {{10}^{11}}\,N{{m}^{-2}})$