Page 187 - 9780077418427.pdf
P. 187
/Users/user-f465/Desktop
tiL12214_ch06_139-176.indd Page 164 9/1/10 9:40 PM user-f465
tiL12214_ch06_139-176.indd Page 164 9/1/10 9:40 PM user-f465 /Users/user-f465/Desktop
A
FIGURE 6.35 Energy losses in transmission are reduced by in-
creasing the voltage, so the voltage of generated power is stepped up
at the power plant. (A) These transformers, for example, might step
up the voltage from tens to hundreds of thousands of volts. After a
step-down transformer reduces the voltage at a substation, still another
transformer (B) reduces the voltage to 120 V for transmission to three
or four houses. B
164 CHAPTER 6 Electricity 6-26
