| A | B |
|---|
| transformer | this has primary and secondary parts |
| turbine | wheel pushed by water, wind or steam |
| direct | current produced by battery |
| heat | current in wire loses some energy to this |
| voltage | before current enters house this must be stepped down |
| 400 | if twice the turns on secondary coil 200 volts changes to this |
| 10 | percent of power plant energy lost to heat |
| 60 | generators produce current at frequency of how many cycles per second |
