A copper rod of length 20 cm and cross-sectional area `2 mm^(2)` is joined with a similar aluminium rod as shown in Fig. 4.6. Find the resistance of the combination between the ends. Resistivity of copper `=1.7xx10^(-8) Omega `m and resistivity of aluminium `=2.6xx10^(-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 (Cu) rod of length 25 cm and cross sectional area 3 mm^(2) is joined with a similar Aluminium (Al) rod as shown in figure. Find the resistance of the combination between the ends A and B. (Take Resistivity of Copper = 1.7 xx 10^(–8)Omegam Resistivity of Aluminium = 2.6 xx 10^(-8)Omegam )

Two rods of copper and aluminium of each of equal length 20 cm and equal cross-sectional area 2 mm^(2) . They are joined (i) in series and (ii) in parallel as shown in figure. Find the resistance of the combination in each case. Resistivity of copper =1.7 xx10^(-8) Omega m and resistivity of aluminium = 2.6 xx 10^(-8)Omega m .

Calculate the resistance of 1 km long copper wire of radius 1 mm . Resistivity of copper is 1.72 xx 10^-8 Omega m .

Calculate the resistance of an aluminium wire of length 50 cmand cross sectional area 2.0mm^(2) . The resistivity of aluminium is (rho)=2.6xx10^(-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).

Resistance of the conductor of length 5m and area of cross -section 4 mm^(2) s 0.02 Omega . Its resistivity is

What length of a copper wire of cross-sectional area 0.01 mm^(2) would be required to obtain a resistance of 1k Omega ? Resistivity of copper =1.7xx10^(-8) Omega 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 .