Normally metals are good conductor of electricity. Which is the good conductor in terms of conductivity ?

25) We find, for a required current carrying capacity, aluminium conductor is larger in cross sectional area than copper. The reason for this is

aluminium gets heated up more than copper

resistivity of aluminium is greater than copper

aluminium is mechanically weaker than copper

aluminium is cheaper than copper

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Diameter of the conductor in mm

Radius of the conductor in mm

Area of the conductor in square mm

Diameter of the conductor in inch

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