A.Ea=3Eb | B.Ea=
| C.ϕa>ϕb | D.ϕa<ϕb |
3 |
Q |
r2 |
A.那里的电场强度越大 |
B.放在那里的电荷的电势能越大 |
C.放在那里的正电荷的电势能越大 |
D.那里的等势面分布越密 |
A.4V | B.8V | C.12V | D.16V |
A.φA>φB EA=EB | B.φA>φB EA<EB |
C.φA>φB EA>EB | D.φA<φB EA=EB |
A.4.5×108V | B.6×108V | C.9×108V | D.2×109V |
A.ϕC=-35V |
B.ϕC>-35V |
C.ϕC<-35V |
D.条件不足,无法判断ϕC的高低 |
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