Power and electricityWatch this thread
can you help me with question 2c
here is what i've done;
i) P=VI and so P=400000x440= 1.8x10^8
ii) 2000000000/1.8x10^8= 11.4 and so 12 cables.
iii) P=IV, P=I^2 x R
P= 440^2 x 0.052= 10kW
iv) i'm not really sure what to do. am i supposed to do 100 x 10kW x 12 (since there are 12 cables) and the what???
and the would the (percentage loss be the power lost/ (1.8x10^8)) x 100 = 99.4 % ?