试题与答案

如图所示,固定在Q点的正点电荷的电场中有两M、N点,已知,下列叙述正确的是 [

题型:不定项选择

题目:

如图所示,固定在Q点的正点电荷的电场中有两M、N点,已知,下列叙述正确的是

[ ]

A.若把一正的点电荷从M点沿直线移到N点,则电场力对该电荷做功,电势能减少

B.若把一正的点电荷从M点沿直线移到N点,则电场力对该电荷做功,电势能增加

C.若把一负的点电荷从M点沿直线移到N点,则电场力对该电荷做功,电势能减少

D.若把一负的点电荷从M点沿直线移到N点,再从N点沿不同路径移回到M点;则该电荷克服电场力做的功等于电场力对该电荷所做的功,电势能不变

答案:

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