Question
Hydroelectric generators (see Figure 20.46) at Hoover Dam produce a maximum current of $8.00 \times 10^3 \textrm{ A}$ at 250 kV. (a) What is the power output? (b) The water that powers the generators enters and leaves the system at low speed (thus its kinetic energy does not change) but loses 160 m in altitude. How many cubic meters per second are needed, assuming 85.0% efficiency?
Question Image

a) $2.0 \textrm{ GW}$

b) $1.5 \times 10^3 \textrm{m}^3\textrm{/s}$

Solution Video