Question

transmission lines are generally operated at
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Answer 1

Answer:

An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. It consists of one or more uninsulated electrical cables (commonly multiples of three for three-phase power) suspended by towers or poles.

Since most of the insulation is provided by the surrounding air, overhead power lines are generally the least costly method of power transmission for large quantities of electric energy.

Explanation:

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Answer 2

Answer:

transmission lines are generally operated at relatively high voltages varying from 69 kV up to 765 kV