NOTE

Monday, February 13, 2012

EXERCISE ELECTRICITY 5


(d)       A power of 9.5 kW is transmitted from a small wind-powered generator to a village along 6000m of cables that have a total resistance of 1 Ω . The power is transmitted at the usual mains supply voltage of 240V.
Calculate
(i)         the current in the cables

(ii)        the power loss due to the heating of the cables

(iii)       the percentage of loss of power


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