Question

electric wires made of Copper and Aluminium and not silver even through it a better conductor of electricity

Answer 1

Electric wires are made up of copper because copper is also a good conductor although it is not better than silver but still it is used because silver is very costly we can wire we can wire whole whole with a copper wire which cost same as 1gm of silver

Answer 2

because  Copper and Aluminium will not melt like silver