Problem 16.16 Challenge

กำหนดให้ \(r = \frac{0.00100}{2} = 0.000500 m\) และ \(E_{\max}= 0.700 MV/m\)

a) จาก \(c = \frac{E_{\max}}{B_{\max\max}}\)

\(B_{\max}=\frac{E_{\max\max}}{c}\)

\(B_{\max}= 2.33 mT \;\blacksquare\)

b) จาก \(I = \frac{1}{c\mu _{0}}E_{rms}^{2}\)

\(I =\frac{1}{c\mu _{0}}(\frac{E_{\max}}{2})^{2}\)

\(I = 650 MW/m^{2} \;\blacksquare\)

c) จาก \(I = \frac{\wp _{av}}{A}\)

\(\wp _{av}= IA\)

\(\wp _{av}= I\pi r^{2}\)

\(\wp _{av}= 510 W \;\blacksquare\)