(PDF ¥Õ¥¡¥¤¥ë: test2.pdf)

[2](b)

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  $$\nabla\phi\times\mbox{\boldmath$A$} = \mbox{($B9TNs<0$K$h$k7W(B... ...al y}f - \mbox{\boldmath$j$}\frac{\partial \phi}{\partial x}f$$ (1)

  
  
  $B$h$j(B
  

  $$\mbox{$B:8JU(B} = \frac{\partial}{\partial x}\left(\frac{\partial \phi}{\partial y}... ...ht) - \frac{\partial}{\partial y}\left(\frac{\partial \phi}{\partial x}f\right)$$ (2)

  $$= \frac{\partial^2\phi}{\partial x\partial y}f -\frac{\partial^2\phi}{\partial y\partial x}f$$ (3)

  $$= 0$$ (4)

  
  
  $B$^$?!"(B
  

  $$\nabla\times\mbox{\boldmath$A$} = \mbox{($B9TNs<0$K$h$k7W;;(B)}... ...partial y} - \mbox{\boldmath$j$}\frac{\partial f}{\partial x}$$ (5)

  
  
  $B$h$j(B
  

  $$\mbox{$B1&JU(B} = - \left(\frac{\partial \phi}{\partial x}\frac{\partial f}{\partial y}-\frac{\partial \phi}{\partial y}\frac{\partial f}{\partial x}\right)$$ (6)

  $$= - \frac{\partial \phi}{\partial y}\frac{\partial f}{\partial x} +... ...ial y}\frac{\partial f}{\partial x} \hspace{1zw}\mbox{($BJPHyJ,$N=g=x8r49$K$h$j(B)}$$ (7)

  $$= 0$$ (8)

  
  
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