(a) Give one example to show how the resistance depends on the nature of material of the conductor.
(b) Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is `2.7 xx 10^(-8) Omegam`.

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

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 cable of length 8 km, diameter 3mm, if its specific resistance is 1.7 xx 10^-8 ohm-metre.

Determine the resistance of a copper wire having a length of 1 km and diameter of 0,5 mm. (Given: rho=Resistivity of copper =1.7 times 10^(-8) Omega m )

Calculate the length of an aluminium wire of diameter 0.4 mm required to have a resistance of 2 Omega at 20 ^@C . Resistivity of aluminium is 2.8 xx 10^-8Omegam .

Calculate the length of an aluminium wire of diameter 0.5 mm required to have a resistance of3 Omega at 20^(@)C .Rresisitvity of aluminium is 2.8xx10^(-8)Omegam

The resistance of a wire of length 330m and cross-section area 1.0 mm^(2) made of material of resistivity 1.0 xx 10^(-7) Omegam is:

Determine the resistance of a copper wire having, a length of 0.1 km and diameter of 0.5 mm. [Given: Resistivity of copper = 1.7 times 10^(-8) Omega m ]

(a) Give two examples of substances which are good conductors of electricity. Why do you think they are good conductors of electricity? (b) Calculate the resistance of a copper wire 1.0 km long and 0.50 mm diameter if the resistivity of copper is 1.7 xx 10^(-8) Omega m .