1.

To increase the visual critical voltage of cporona for an overhead line, one solid phase-conductor is replaced by a bundle of four smaller conductors per phase, having an aggregate cross-sectional area equal to that of the solid conductor. If the radius of the solid conductor is 40 mm, then the radius of each of the bundle conductors would be _______ mm

A. 2.0 mm.
B. 0.020 mm.
C. 0.20 mm.
D. 20 mm.
Answer» E.


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