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Calculate efficiency of the radial power grid as shown in Figure B2a andevaluate the efficiency if the power grid forms a ring network. Compare theresults.

Given that distance of AB is 3km, BC is 2km, and the ring line AC is 2.5km. Line resistance is 0.001Ω/m. Input voltage at substation A is 33kV. Circuit output at substation B is 20A and circuit output at substation C is 10A.

A A

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