Transmission Lines
Electricity and Magnetism
Level
1
In a comparison between an underground and overhead transmission line, it will be accurate to say that:
Overhead transmission lines have a larger charging capacitance than underground lines
Overhead transmission lines are harder to install and cost more than underground lines
Overhead transmission lines are not able to transmit higher voltages at longer distances
Overhead transmission lines can transmit higher voltages at longer distances
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The solution is overhead transmission lines are able to transmit higher voltages at longer distances, reason being that underground lines tend to have much higher charging capacitance than your every day overhead lines, therefore prohibiting either the distance or the magnitude of the voltage it can carry.