The tensile strength of steel is `5 xx 10^7 N m^-2`. Find the maximum length of the wire that can hang vertically , without breking it. Densityof steel is `8 xx 10^3 kg m^-3.

In the above problem, If the yield strength of steel is 2.5 xx 10^8 N m^-2 , what is the maximum weight that can be hung at the lower end of the wire?

A wire having a mass of 0.45 kg posseses a resistanfce of 0.014 Omega . If the resistivity of the material fo wire is 1.78 xx10^-7 Omegam , calculate its length and radius. Given that the density of the material of wire is 8.93 xx10^3 kg m^-3

Given that resistivity of copper is 1.68 xx 10^-8Omega m. Calculate the amount of copper required to draw a wire 10 km long having resistane 10Omega . The density of copper is 8.9 xx 10^3 kg m^-3

A steel wire of mass mu per unit length with a circular cross section has a radius of 0.1 cm. The wire is of length 10 m when measured lying horizontal, and hangs from a hook on the wall. A mass of 25 kg is hung from the free end of the wire. Assuming the wire to be uniform and lateral strains < < longitudinal strains, find the extension in the length of the wire. The density of steel is 7860 kg m^-3 (Young's modulues Y = 2 xx 10^11 N m^-2)

The Young's modulus for Steel is 2.0 xx 10^11 N m^-2 . If the interatomic spacing for the metal is 2.8 overset@A , find the increase in the interatomic spacing for a force of 10^9N m^-2

A horizontal wire 0.1 m long carries a current of 5 A. Find the magntiude and diretion of the magnetic field, which can support the weight of the wire. Assume wire to be of mass 3xx10^-3 kg m^-1

Dielectric strength of air is 3xx10^6 V m^-1 . If electric potential on a sphere can be 9xx10^6V , then find the minimum radius of the sphere.

A current of 1.8 A flows through a wire of cross-sectional area 0.5 mm^(2) ? Find the current density in the wire. If the number density of conduction electrons in the wire is 8.8 xx 10^(28) m^(-3) , find the drift speed of electrons.

A uniform copper wire of mass 2.23xx10^(-3) kg carries a current of 1 A when 1.7 V is applied across it. Calculate its length and area of cross-section. If the wire is uniformly stretched to double its length, calculate the new resistance. Density of copper is 8.92xx10^(3) kg m^(-3) and resistivity is 1.7xx10^(-8) Omega m.