Numerical - Inductance per phase per km of the transposed line

Q.  A three phase, 50Hz transmission line consists of three equal conductors of radii ‘r’ placed in a horizontal plane with a spacing of 6m between middle and outer conductor. If the radius of each conductor is 12.5 mm, then inductance per phase per km of the transposed line will be
- Published on 24 Nov 15

a. 1.33 mH/km
b. 1.65 mH/km
c. 0.38 mH/km
d. 2.145 mH/km

ANSWER: 1.33 mH/km

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