Questions in Mechanical Properties of Solids

Select	Question
	Two identical wires of rubber and iron are stretched by the same weight, then the number of atoms in the iron wire will be
	The force constant of a wire does not depend on
	The elasticity of invar
	After effects of elasticity are maximum for
	In suspended type moving coil galvanometer, quartz suspension is used because
	A force of $200 N$ is applied at one end of a wire of length $2 m$ and having area of cross-section ${{10}^{-2}}\,c{{m}^{2}}$. The other end of the wire is rigidly fixed. If coefficient of linear expansion of the wire $\alpha =8\times {{10}^{-6}}/{}^\circ C$ and Young's modulus $Y=2.2\times {{10}^{11}}\,N/{{m}^{2}}$ and its temperature is increased by 5°C, then the increase in the tension of the wire will be
	When compared with solids and liquids, the gases have
	The length of a wire is $1.0 m$ and the area of cross-section is $1.0\times {{10}^{-2}}\,c{{m}^{2}}$. If the work done for increase in length by $0.2 cm$ is $0.4 joule$, then Young's modulus of the material of the wire is
	The quality of the material which opposes the change in shape, volume or length is called
	For silver, Young's modulus is $7.25\times {{10}^{10}}\,N/{{m}^{2}}$ and Bulk modulus is $11\times {{10}^{10}}\,N/{{m}^{2}}$. Its Poisson's ratio will be