The resistivity os copper is `1.76 xx 10^-8` ohm m. The radius of the wire is `1 mm`. Calculate the length of a telegraph wire needed for having a resistance of `10.5 Omega`.

Resistivity of copper is 1.76 times 10^-6 Omega .cm. Express it in ohm.m.

Given that resistivity of copper is 1.68xx10^(-8) Omega m. Calculate the amount of copper required to draw a wire 10 km long having resistance of 10 Omega . The density of copper is 8.9xx10^(3) kg m^(-3) .

Calculate the resistivity of a material of a wire 10 m long, 0.4 mm in diameter and having a resistance of 2.0 Omega .

Calculate the resistivity of a wire having resistance .02 ohm, length = 10 m and area = 1mm^2

A copper wire of resistivity 1.6xx10^-8 ohm-m has a cross sectional area of 20xx10^-4 cm^2 . Calculate the length of wire required to make a 10 ohm coil.

i] List the differences between electrical resistance and resistivity of conductor. ii] A copper wire of resistivity 1.63xx10^(-8)Omega-m has cross section area of 10.3xx10^(-4)cm^(2) . Calculate the length of the wire required to make a 20Omega coil.

Calculate the resistivity of the material of a wire 1.0 m long, 0.4 mm diameter and having a resistance of 2.0 Omega .