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Q.

Which material is preferred to be used for electrical transmission lines based on their resistivities?


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a

Copper

b

Mercury

c

Iron

d

Nichrome 

answer is A.

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Detailed Solution

Copper is the material that is preferred to be used for electrical transmission lines.
The property of a metal to resist electric current is known as resistivity. Conductivity and resistivity are inversely related. Copper is a metal that is economical compared to other metals. It has low resistivity as shown in the above table. As resistivity is less conductivity is more. So, copper is the preferred metal.
 
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