摘要
通常球形电容器的电容公式为c＝4πεoRARB/（RB－RA），实际上此式在球壳外径为无穷大时成立，当球壳外径有限时，球形电容器的公式应改为：c＝4πεo／［（1／RA）－（1／RB）＋（1／R。）］
The Capacity of a sphere capacitor usually is written in the form of c=4πεoRARB/(RB-RA), Infact, the formula is correct when the outer radius of the shell is infinite. When the outer radius is finitethe capacity of the sphere capacitor should be changed into c=4πεo/ [ (1 / RA)-(1 / RB) ＋ (1/Rc) ]
关键词
球形电容器
球壳
外径
电容
Sphere capacitor, Shell, Outer radius, Capacity
