本题目来源于试卷: gc textbook chapter 17 Electric Potential，类别为 通用国际物理
[问答题]
If two points are at thwg 6gjkjnwd1z jvwa) t-646*bei/ zamc q7rv;f9/3lx klzj(+ s same potential, does this mean that no work is done in moving a test charge from one point to the other? Does thj q;a+c/79m vs3zzkf/ ll x(riis imply that no force need be exerted? Explain.
参考答案: If two points are at the same potential,
then no NET work was done in moving a test charge from one point to the
other. Along some segments of the path,
some positive work might have been done, but along other segments of the path,
negative work would then have been done.
And if the object was moved along an equipotential line, then no work
would have been done along any segment of the path. Along
any segment of the path where positive or negative work was done, a force would
have to be exerted. If the object was
moved along an equipotential line, then no force would have been exerted along
any segment of the path. This
is analogous to climbing up and then back down a flight of stairs to get from
one point to another point on the same floor of a building. Gravitational potential increased while going
up the stairs, and decreased while going down the stairs. A force was required both to go up the
stairs and down the stairs. If instead
you walked on the level from one point to another, then the gravitational
potential was constant, and no force was need to change gravitational
potential.
本题详细解析:
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