Due to a stress of 20 N/`m^2` the percentage increase in the length of a wire is 0.01. calculate the young's modulus.

On applying a stress of 20 xx 10^8 N/m^2 , the length of a perfectly elastic wire is doubled. Its Young's modulus will be

The bulk modulus of a liquid is 2 xx 10^10 N/m^2 . What is the percentage decrease in the volume of the liquid , when the pressure is increased by 20 atmosphere > ( one atmosphere = 10^5 N /m^2 ).

A force of 100 N produces a change of 0.01% in a length of wire of area of cross -section 1.0 mm^2 . Young's modulus of the wire is

The resistance of a metal wire of length 1m is 3 ohm. The diameter of the wire is 0.2 m. Calculate the resistivity of the metal at the temperature.

An aluminium wire and a steel wire both of the same length and cross-section are joined end to end . The composite wire is hung from a rigid support and a load is suspended from the free end . If the increase in length of the composite wire is 2.7 mm, find the increase in length of each wire. Y_al = 7 xx 10^10 N/m^2 and Y_steel = 2 xx 10^11 N/m^2 .

Young's modulus of the material of a wire is 9.8 x 10^10 N/m^2 and the area of cross-section of the wire is 0.012 cm^2 . Elastic limit of the material of the wire is exceeded when the strain exceeds 1/2400 . Find the maximum load that can be used to stretch the wire without causing a permanent set.

Calcium metal crystallises in a face centred cubic lattice with edge length of 0.556 nm. Calculate the density of the metal if it contains (i) 0.2% Frenkel defects (ii) 0.1% Schottky defects