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Question

Copper has less resistance than aluminium and has greater tensile strength than aluminium. To work, copper proves an excellent material as compared to aluminium. In spite of this, now a days aluminium is extensively used in transmission and distribution of power supply because : 

A.

It is cheaper than copper 

B.

Copper is not available 

C.

It is light in weight 

D.

It is easily available

Answer ( Option A)

It is cheaper than copper 

Solution

Copper has less resistance than aluminium and has greater tensile strength than aluminium, still now a days aluminium is extensively used in transmission and distribution of power supply because aluminium is generally more inexpensive as compared to copper-conductors.

Hence, the correct option is (A).

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