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将一个正电荷从无穷远处移入电场中M点,电势能减少了8×10-9 J,若将另一等量的负电荷从无穷远处移入电场中N点,电势能

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һɴԶ糡M,ܼ8.0...
һɴԶ糡M,ܼ8.010-9J,һĸɴԶ糡еN,9.810-9J,ж...
糡ۺϸϰ
[ԵƵ]һɴԶ糡 M ,ܼ 8.010-9 J, һĸɴԶ糡е N ,...
73 糡ܵ
һɴԶ糡M,ܼ8.010-9 J, һĸɴԶ糡еN ,9.810-9 J,...
3-1,,,,ǿϰ
һɴԶ糡 M ,ܼ 8.010-9 J,һĸɴ Զ糡е N , 9.010-9 J,...
ĩܸϰ֮糡
C 5һɴԶ糡 M ,ܼ 8 ?...10 J,һĸɴ괦 糡е N ,...
һɴԶ糡еM,糡8.0...
ѡ ơ һɴԶ糡M,糡8.010-9ĸɴԶͬһ糡еN,...
糡()1
һɴԶ糡 M ,ܼ 8.010 9 J,һĸɴ - Զ糡е N , 9.010 9 ...
ơѧ
5:һɴԶ糡 M ,ܼ 8.0 10-9 J,һ ĸɴԶ糡е N , 9.0...
һɴԶ糡еM,糡Ϊ4.0...
ѡ һɴԶM,糡Ϊ4.010-9J,һĸɴNԶ,糡Ϊ6.010-9...
ܺ͵Ƶѧ() -
һɴԶ糡 M ,810-8 J;һ ɴԶ糡 N ,糡Ϊ-910-8 J....
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