U | AB |
|
U | AC |
△E | k |
U | CA |
U | BA |
U | CA |
U | CB |
+U | BA |
U | CB |
=U | BA |
△E | k |
2
| ||
ae |
2
| ||
ae |
A.Ea=Eb=Ec | B.Ea>Eb>Ec |
C.∅a-∅b=∅b-∅c | D.∅a>∅b>∅c |
A.E=
| ||
B.若取走-q,P点的电场强度E=0 | ||
C.若检验电荷为-2q,则E=
| ||
D.E与检验电荷无关 |
A.该电场是匀强电场,场强方向垂直于AA′,且斜向左下方 | ||
B.该电场是匀强电场,场强大小E=
| ||
C.该电场是匀强电场,距C点距离为2cm的所有点中,最高电势为4V,最低电势为-4V | ||
D.该电场可能不是匀强电场,E=
|
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