Calculate the resistance of 1 km long copper wire of radius 1 mm. (Resistivity of copper is `1.72 xx10^(-8) Omega m` ).

Find the resistance of a copper coil of total wire-length 10m and area of cross section 1.0mm^(2). What would be the resistance of a similar coil of aluminium? The resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium 2.6xx10^(-8)(Omega).

You need to produce a set of cylindrical copper wires 2.5 m long that will have a resistance fo 0.125Omega each. What will be the mass of each of these wires? (Density of copper is 8.9xx10^3 kgm^(-3) and resistivity of copper is 1.72 xx10^(-8) OmegaM).

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

In house wiring, copper wire 2.05 mm in diameter is often used. Find the resistane of 35.0 m long wire. Specific resistance of copper is 1.72xx10^-8Omega-m .

What length of a copper wire of cross-sectional area 0.01 mm^2 will be needed to prepare a resistance of 1 kOmega ? Resistivity of copper = 1.7 xx 10^(-8) Omega m .

A copper rod of length 20cm and cross-sectional area 2mm^(2) is joined with a similar aluminium rod as shown in figure .Find the resistance of the combination between the ends, Resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium =2.6xx10^(-8)(Omega)m .

A copper wire of cross - sectional area 3.4 m m^(2) and length of the wire 400m, specific resistivity of copper is 1.7 xx 10^(-8)Omega-m . Then the resistance of the wire is

An inductor coil of inductance 17 mH is constructed from a copper wire of length 100 m and cross - sectional are 1mm^2 . Calculate the time constant of the circuit if this inductor is joined across an ideal battery. The resistivity of copper = 1.7 X 10^(-8) Omega m.

A straight copper-wire of length 100m and cross-sectional area 1.0mm^(2) carries a current 4.5A . Assuming that one free electron corresponds to each copper atom, find (a) The time it takes an electron to displace from one end of the wire to the other. (b) The sum of electrostatic forces acting on all free electrons in the given wire. Given resistivity of copper is 1.72xx10^(-8)Omega-m and density of copper is 8.96g//cm^(3) .

A bulb with rating 250V, 100W is connected to a power supply of 220 V situatd 10 m away using a copper wire of area of cross section 5 mm^2 . How much power will be consumed by the connecting wire? Resistivity of copper = 1.7 xx 10^(-8) Omegam .