Re: [問題] jackson中的電容C
: 我有再看了課本 但不是很懂= =
: 老師上課有講一個簡單例題
: 半徑a跟b的同心圓殼 算出來的C11=-C12=-C21=/=C22
: 最後就取C=C11 這怎麼去決定?
: C11=ab/(b-a) C12=C21=-ab/(b-a) C22=b^2/(b-a)
the coefficients Cij are capacities
or capacitances while Cij,i=/=j,are called coefficients of induction.
thecapacitance of a conductor is therefore the total charge on the conductor
when it is maintained at unit potential,
all other of conductors beingheld at zero potential.
sometimes the capacitance of a system of conductors is also defined.
for example,
the capacitance of two conductors carrying equal and opposite charges
in the presence of other grounded conductors is defined as the ratio
of the charge on one conductor to the potential difference between them.
the equations Qi=summation CijVi can be used to express this capacitance
in terms of the coefficients Cij
如果沒錯你應該是說這段吧
可是除了提到V=V1-V2
我不太了解哪裡敘述可以導出你提到的C=det(Cij)/sum(Cij)
是我英文不好嗎~"~
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※ 編輯: mouwat 來自: 114.42.215.151 (11/18 19:47)
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