本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学
[问答题]
If the electric flux through i zty twim1 sjppp3;2,r ac;)6:ozwu.a closed surfacevxm94rotwbd.5ighe* d e)l :) is zero, is the electric field necessar4r d)gi.5 lwhv:dm*9xetobe ) ily zero at all points on the surface? Explain. What about the converse: If $\vec{E}\,=\,0$ at all points on the surface is the flux through the surface zero?
参考答案: Just because the electric flux through a closed surface is zero, the
field need not be zero on the surface.
For example, consider a closed surface near an isolated point charge,
and the surface does not enclose the charge.
There will be electric field lines passing through the surface, but the
total electric flux through the surface will be zero since the surface does not
enclose any charge. The same number of
field lines will enter the volume enclosed by the surface as leave the volume
enclosed by the surface.
On the contrary, if $\vec{E}\,=\,0$
at all points on the surface, then there are no electric field lines passing
through the surface, and so the flux through the surface is zero.
本题详细解析:
暂无
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