8. 一个带正电物体沿电场线方向运动,则下列一定正确的是( )
静电力做功与电势能 · 历年高考物理真题与解析
本页汇总 高考真题检索 的「静电力做功与电势能」高考物理真题共 2 道,覆盖 2014–2021 年,最常出题型为 单选题;含完整答案与解析。
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2014–2021
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2. (6分) 地球表面附近某区域存在大小为150N/C、方向竖直向下的电场.一质
量为1.00×l0 ﹣4kg、带电量为﹣1.00×10﹣7C的小球从静止释放,在电场区域
内下落10.0m.对此过程,该小球的电势能和动能的改变量分别为(重力加
速度大小取9.80m/s 2,忽略空气阻力) ( )
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