What force is frquired to stretch a steel wire 1 sq. cm in cross-section to 1.1 times? `Y=2×10^11Nm−2`

A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10^-5 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10^-5 M^2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?

A wire carries a current of 1.2 A when a potential difference of 1.8 V is applied across it. What is its conductance? If the wire is of length 3 m and area of cross-section 5.4 xx 10^-6 m^2 calculate its conductivity.

What is the drift velocity of electrons in a silver wire of length 1 m, area of cross-section 3.14 xx 10^-6m^2 and carrying a current of 10 A. Given, charge on electron = 1.6 xx 10^-19C , Avogadro number = 6.02 xx 10^23 atomic weight of silver = 108 and density of silver = 10.5 xx 10^3 kg m^-3 .

The resistivity of potentiometer wire is 10^-7 ohm m and its area of cross-section is 10^-6m^2 . When a current I = 0.1. A flows through the wire, its potential gradient is

A copper and a steel wire of the same diameter are connected end to end. A deforming force F is applied to this composite wire which causes a total elongation of 1 cm. The two wies will have

A negligible small current is passed through a wire of length 15 m and uniform cross section 6.0 xx 10^-7 m^2 and its resistance is measured to be 5.0 Omega . What is the resistivity of the material?

A one metre long wire having area of cross-section 1 mm^2 is stretched by a mass of 3 kg. Calculate the increase in length. Take Y = 2 xx 10^11 N m^-2