                       DC             60      ①   AC   
                             A  B   A  B                                   A      60  B        B       60  A       
                                      60       60      ①        50  — 
                                                                                                                                                   5—12                              60   
           —                                —                                                                
         i    V                   5—15          5—17             5—23                               
                     110      1350     110                                15                5—17      1350     110    
    1350＝    ×110                       5—24 
                                 110
         ＝                               5—25 
                                1350
                            ＝12.27                         5—26 
15       
                      5—15          110      12.27  
     12.27＝     
                                                5—27 
       110          12.27
 ＝                          5—28 
                      110
                 ＝ 8.96                               5—29 

                                                          e       1.6×10－19   
                                   
                                          
                                                           
                                                  
  E                                E                   
                            
                                                                        V          V           q     V                        qV   
                                      A    1    1  \                                               
                        
                                   
                                     
    AC                         CD                                     
   
                                                                电荷                                              electric charge
                                                 电荷守恒                                       conservation of charge
                                                                库伦定律                                       coulomb,s law
                                                  电力常数                                      electric fcrce constant
                                                                       库伦                                             coulomb
                                                             电子的电荷                                   charge on the electron，e
                                                         电势能                                          electric potential energy
                                                                       场                                                field
                                            超距作用                                      action ata distance                               
                                                                       以太                                            ether
                                                               电场                                             electric field
                                                       电场线                                          electric field line
                                                               电势                                             electric potential
                                                                      伏特                                             volt
                                                                    电压                                             voltage
                                                              电流                                             electric current
                                                               蓄电池                                         storage battery
                                                           绝缘体                                         insulator
                                                             导体                                            conductor
                                                                电极                                            terminal
                                                   安倍                                                                  ampere
                                             欧姆定律                                                           ohm, s law
                                         电阻                                                                  elecric resistance
                                                     欧姆                                                                 ohm
                                            电功率                                                              electric power
                                            电热                                                                  electric heat
                                 直流电                                                              direct current （DC）
                                交流电                                                              alternating current ( AC)
                                   有效电流                                                           effective current
                                          有效电压