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試卷名稱：110年 - 110台灣聯合大學系統_碩士班招生考試_電機類:電磁學#105808
年份：110年
科目：研究所、轉學考(插大)◆電磁學
1. (5%) A cylindrical capacitor consists of an inner conductor of radius a, and an outer conductor whose inner radius is b. The space between the conductors is filled with a dielectric of permittivity ε. The length of the capacitor is L. The capacitance of this this capacitor is
(A) C=2πεL/ln(b/a)
(B) C=2πεL/In(a/b)
(C)C=2πεL/In(ab)
(D) none of the mentioned