Question

when compared to domestic electric cable used to transport electricity from one town to another are very thick.Give reason.​

Answer 1

Answer:

It is because of high amount of electricity passing through it. Thickness provides low resistivity.

i.e. resistivity inversely proportional to cross section area of conductor

Answer 2

When compared to domestic electric cable used to transport electricity from one town to another are very thick, because -

• The transport electricity wires cover a large distance between two towns which means the electricity flow has to cover a large distance through the conductive wire, before reaching the destination.

• Now,while covering such large distance,there are chances that the final electricity output become smaller than the initial electricity,due to the resistance of the wire.

• But,we know that the cross section area of the wire is inversely proportional to the amount of resistance. Which means,thick wires have lower resistance than thin wires.

• For this lower resistance,the thick wires are used for transport electricity.