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¸òÎ®ÅÅÎ® $I e^{j\omega t}$ ¤ÎÎ®¤ì¤ëÅÅÎ®¥ë¡¼¥×¤âÅÅ¼§ÇÈ¤òÈ¯À¸¤¹¤ë¡£ ¤³¤ÎÅÅÎ®¤Îºî¤ë¥Ù¥¯¥È¥ë¥Ý¥Æ¥ó¥·¥ã¥ë¤Ï¡¢ ¥¹¥«¥é¡¼ÀþÀÑÊ¬¤Î¥¹¥È¡¼¥¯¥¹¤ÎÄêÍý¡ÊStokes theorem of line integral of scalar field¡Ë $\oint_C\phi\emph{dr}=\int\emph{dS}\times\mathop{\mathop{\emph ¢¦}\nolimits }\nolimits \phi$ ¤òÍøÍÑ¤·¤Æ¡¢ ¼¡¼°¤Î¤è¤¦¤Ë¤Ê¤ë¡£

$\displaystyle \emph A$	$\displaystyle =$	$\displaystyle \oint_C\frac{\mu_0I}{4\pi}\emph{dr'} \frac{e^{j\omega(t-\vert\emp... ...rac{e^{j\omega(t-\vert\emph r-\emph{r'}\vert/c)}} {\vert\emph r-\emph{r'}\vert}$
	$\displaystyle \approx$	$\displaystyle -\frac{\mu_0I}{4\pi}\int_S\emph{dS'}\times\mathop{\mathop{\emph ¢... ...\times \mathop{\mathop{\emph ¢¦}\nolimits }\nolimits \frac{e^{j\omega(t-r/c)}}r$
	$\displaystyle =$	$\displaystyle \frac{\mu_0}{4\pi}e^{j\omega(t-r/c)}\left(1+\frac{j\omega r} c\right)\frac{\emph m\times\emph r}{r^3}$	(7.12)

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$\displaystyle \emph E$	$\displaystyle =$	$\displaystyle -\D{\emph A}t$
	$\displaystyle =$	$\displaystyle -j\omega\frac{\mu_0}{4\pi}\left(1+\frac{j\omega r}c\right) \frac{\emph m\times\emph r}{r^3}e^{j\omega(t-r/c)}$	(7.13)
$\displaystyle \emph B$	$\displaystyle =$	$\displaystyle \mathop{\mathop{\emph ¢¦}\nolimits \times}\nolimits \emph A$
	$\displaystyle =$	$\displaystyle \frac{\mu_0}{4\pi}\left[\left(1+\frac{j\omega r}c\right) \frac{3\... ...2}\frac{\emph r(\emph m \cdot\emph r)-r^2\emph m}{r^3}\right]e^{j\omega(t-r/c)}$	(7.14)