題組內容

2. Ad-c voltage V is applied across a cylindrical capacitor of length L. The radi of the inner and outer conductors are R and 4R, respectively. The space between the conductors is filled with two different lossy dielectrics having, respectively, permittivity ε1 and conductivityσ1 in the region R＜r＜2R, and permittivity ε2 and conductivity σ2 in the region 2R＜K4R. Determine

(b) the surface charge density on the inner and outer conductors and at the interface between the two dielectrics. (15分)