Discussion
An EHV transmission lines, bundled conductors result to :
Answer: D
Bundled conductors increase the capacitance of an EHV line.
A bundle of two or more sub-conductors per phase behaves like one conductor of much larger effective radius (geometric mean radius). A larger effective radius reduces the line's inductance and increases its capacitance. The lower reactance and higher capacitance raise the surge impedance loading, and the reduced surface field cuts corona loss and radio interference, which is the main reason EHV lines are bundled.
Inductance falls, not rises, and capacitance rises, not falls. Resistance is not increased; for the same total cross-section it stays about the same.
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