Chapter 20: Q69PE (page 735)
a) What current is needed to transmit\({\rm{1}}{\rm{.00 \times 1}}{{\rm{0}}^{\rm{2}}}{\rm{ MW}}\)of power at\({\rm{480 V}}\)? (b) What power is dissipated by the transmission lines if they have a\({\rm{1}}{\rm{.00 \Omega }}\)resistance? (c) What is unreasonable about this result? (d) Which assumptions are unreasonable, or which premises are inconsistent?
Short Answer
- Current needed to transmit the given power is\({\rm{2}}{\rm{.08 \times 1}}{{\rm{0}}^{\rm{5}}}{\rm{\;A}}\).
- Power dissipated by the transmission line is\({\rm{43}}{\rm{.3 GW}}\).
- Power dissipated in transmission is huge.
- The voltage is too low.