100 mg mass of nichrome metal is drawn into a wire of area of cross-section 0.05 mm. Calculate the resistance of this wire. Given density of nichrome` 8.4 xx 10^3 "kgm"^(-3)` and resistivity of the material as `1.2 xx 10^(-6) Omega` m.

Calculate the resistance of a metal wire of length 2 m and area of cross section 1·55 xx 10^(-6) m^(2) , if the resistivity of the metal be 2·8 xx 10^(-8) Omega m ?

Calculate the resistance of a 1 Km long copper wire of area of cross section 2 xx 10^(-2) cm^(2) . The resistivity of copper is 1.623 xx 10^(-8) ohm-meter.

There are two metallic wires of the same thickness made from iron and silver. If the length of iron wire is 12cm, what should be the length of silver wire which is equal to the resistance of iron wire? Data : Resistivity of iron = 10 xx 10^(-8) Omega m Resistivity of silver = 16 xx 10^(-8) Omega m

Estimate the size of diamond molecule given its atomic mass 12.01u and density 2.22 xx 10^3 "kgm"^(-3) .

The resistance of a wire of 0.01 cm radius is 10 Omega . If the resistivity of the material of the wire is 50 xx 10^(-8) ohm meter, find the length of the wire.