題組內容

4.For a coaxial transmission line shown in Fig. 2, the capacitance per unit length is61d52ba8d6702.jpgand the inductance per unit length is61d52bcb8ab30.jpg. At high frequencies, the intemal inductance drops off (that is, approaching 0, and you should know which term is the internal inductance).

(4%)(b)請問在地(Ground,即半徑b粗體部分)外的 magnetic flux density B值為何? The capacitance of a line charge of radius a over a ground O, as shown in Left of Fig. 3 C =61d52cd492dd7.jpg.