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Read the following passage and then answer questionson the basis of your understanding of the passage and the related studied concepts. A small township with a demand of 880 kW of electric power at 220 V is situated 20 km away from a mini hydropower generating station generating power at 440 V. The resistance of the two wire line carrying power is 0.5 ohm per km. The town gets power from the line through a 11 kV-220 V step down transformer at a substation at the township. (b) Estimated value of line power loss in the form of heat is

Answer»

128 kW
256 kW
4.84 kW
512 kW

Solution :(i) 128 kW
[Hint: Reistance of TWO wier LINE `R = 0.5 xx 2 xx 20 = 20 Omega`


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