늈ȵĽ̰OӋ
һ늈

(1)늺֮gͨ^ʽ|늈l(f)ģ늺ɵ܇늈.
(2)|늈ܵ
늈еκΎwܵ늈ͬһc늺늈вͬc̎ܵ늈ĴСܲһ.
늈ʹеČwao늸БF(xin).
ۮw늈Ƅӕr늈w@ʾ늈.
늈(E)
ٶx늈ijһc늺ܵ늈F늺qıֵԓc늈ȣQ.Eʾ
ʽE=F/q(m늈)
λN/C
ڷԣWҎ(gu)늈ijcĈ늺ԓcܵ늈ķͬ.
늈ijһc̎늈EΨһģĴСͷcԓc늺qoPQ늈Դ늺ɼgλã늈ÿһc늈cǷ늺ɟoP.
+Q P r
c늺܇늈늈ȵįB
(1)c늺܇늈
ٴE=kQ/r2(ֻmc늺ɵ늈)
ڷ늺ɣEķQPBxQ;ؓ늺ɣEķPQBָQ.
(2)늈ȵįBԭijcĈԓc܇늺ɆΪڕrԓcaĈʸ.
Cһ돽Rľw()ⲿa늈cһλĵ늺ȵc늺ɮa늈ͬc늈ȞE=kQ/r2
늈
(1)늈늈Ǯ늈еһllзÿcоʾԓc늈ȵķ
(2)늈'|
늈ÿcоԓc늈ȵķ.
늈ܷӳ늈ȵĴС().
o늈늈ʼ늺ɻoFhֹؓ늺ɻoFh]Ҳڟo늺̎Д
ɗl늈ڟo늺ཻ̎()
Nc늺늈ķֲr
塢늈
(1)x늈иcĴСͬ늈ͽЄ늈.
(2)늈늈һM̶ܳͬ(g)ƽֱ.ɵȴ?gu)N늺ɵƽнٰg늈߅DŽ늈.Ҋ늈늈
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