Page 38 - Maxwell House
P. 38

18                                                                 Chapter 1

        derivative  = 0 vanishes and the facade and back walls of House becomes decoupled, as
                  
        shown in Figure 1.5.1b.
        Let's say, in 1.5.1a two black arrows connect the   node, one comes from  node through the
                                                
        operator ( x) and another one comes from  node through the operator (− ).  Therefore, the
                                                                      
                                                           vector     is the sum of two
                                                                  
                       0                     0             incoming   vectors    x 
                                                           and (− ),   i.e.       =
                                                                  
                                                                                   nd
                                                                     that is the 2
                q                     q                     x  −  
               qv        -            qv                   Maxwell’s equation and so on.
                                  -
                                                           The entire set of the differential
                                                           form of  Maxwell’s equations +
                                                           Lorentz’s  force  equation
                                                           corresponding to Figure 1.5.1
             0                     0                       is shown in the second column
                               a)                     b)
                                                           of Table 1.7. Some  new
            Figure 1.5.1 Maxwell’s House, a) Time dependable   equations and the integral form
                    fields, b) Static and steady fields    of Maxwell’s equations in this
                                                           table will be introduced later.
                                                                            Table 1.7
                    Integral Form           Differential Form       Comments
                                                               Lorentz’s force
                    =   +   x       =   +   x   equation for electric
                                                  
                                                        
                              
                        
                                                               charge
                                                                st
                                               1  Maxwell’s equation
         1  − �  ∘  = �  ∘  +    − x  =  +      or Faraday’s law
                                              
                       
                                                                nd
                                                               2  Maxwell’s equation
         2    �  ∘  = �    ∘  +    x  =    +     or Ampere’s law +
                                                               Maxwell’s
                                          
                      
                                                               displacement current
                                                               3  Maxwell’s equation
                                                                rd
         3         �  ∘  =      ∘  =     or Gauss’s law
                                                       
                                 
                     
                                                                th
         4         �  ∘  =      ∘  =      4  Maxwell’s equation
                                
                     
                                                               Continuity equation or
         5     �    ∘  +   ()  = 0    ∘    +     = 0   electric charge
                               
                                           conservation law
                                                               Continuity equation or
         6     �    ∘  +   ()  = 0    ∘    +     = 0   magnetic charge
                               
                                           conservation law
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