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A 175-kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.45 x 109 2 resistance.
(a) What is the resistance to ground of 50 of these insulators? (Assume the insulators are connected in parallel.)
2
(b) Calculate the power dissipated by 50 of them.
W
(c) What fraction of the power carried by the line is this?
P
Ptotal

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