试题与答案

如图甲,真空中有一半径为R、电荷量为+Q的均匀带电球体,以球心为坐标原点,沿半径

题型:选择题

题目:

如图甲,真空中有一半径为R、电荷量为+Q的均匀带电球体,以球心为坐标原点,沿半径方向建立x轴。理论分析表明,x 轴上各点的场强随x变化关系如图乙,已知x1与R两点间距大于R与x2的两点间距,则

A.x2处场强大小为

B.x1、x2两点处的电势相同

C.球内部的电场为匀强电场

D.假设将试探电荷沿x轴移动,则从x1移到R处和从R移到x2处静电力做功相同

答案:

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