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

Answer is:

resistivity of aluminium is greater than copper

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

Answer is:

porcelain

silver

gold

copper

Answer is:

Water

Carbon

Mica

Copper

Answer is:

Porcelain

Plastic

Rubber

Copper

Answer is: