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大学物理习题答案 - 百度文库

Դû ʱ䣺2025/7/26 17:48:03 loading ƪĵֻ
˵ݽԤݿܲȫҪĵҪݣwordʹáword΢ź:xxxxxxxQQxxxxxx ܸṩĵл֧½⡣

Ϊ?dl=2RΪ

B=

?0R2I2r3=

?0IR22(R2?x2)3/22֡

(2) BķxָԲĵϵ2֡

3ԲεͬĽԲͲɡͼʾͲijΪLͲİ뾶ֱΪR1R2Ͳ֮Ϊա֤ԲεĵΪ

ĵݶʽΪC?QʽQΪĵUU=+-ΪĵƲ

֤ΪֵĵݣǼеQ(Ͳ

ڱͲֱеQ+Q)˵ıԵЧӦɸ˹Ϊrһĵ糡ǿΪ

E??Q?. (R1

U=+-=??E?dr??R?R21Q2??0rLdr=

Q2??0LlnR22֡ R1˵ѹݵĶʽͿɵԲεĵΪ

C?2??0LQ=2֡ Uln(R2/R1)

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