河南省三门峡市某校2024年七年级新生学情检测物理试卷答案试卷答案,炎德英才答案网站目前收集并整理关于河南省三门峡市某校2024年七年级新生学情检测物理试卷答案试卷答案得系列试题及其答案，更多试题答案请关注我们

河南省三门峡市某校2024年七年级新生学情检测物理试卷答案试卷答案

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河南省三门峡市某校2024年七年级新生学情检测物理试卷答案第一部分

14.(13分)如图所示,虚线MN左侧有一方向水平向左、电场强度大小为E的匀强电场,在两E1条平行的虚线MN和PQ之间存在着宽为L、方向竖直向下、电场强度大小为E(未知)的E2-q(q>0)、匀强电场,在虚线PQ右侧距离为L处有一竖直放置的屏.现将一带电量为一q(q>0)、质量为m的带电粒子无初速度地放入电场E中的A点,最后打在右侧屏上的K点(图中未画E1出).已知A点到MN的距离为L2,AO连线与屏垂直,O为垂足,不计带电粒子的重力,求:(1)带电粒子到MN的速度大小;(2)若E2=E12,,带带电粒子离开电场E2时的速度;(3)调节E的大小可使K点在屏的位置发生变化,由于实际生产的需要,现要保证K点到E2O点的距离d满足E2E1的范围.MP足12Ld52L,此条件下的

河南省三门峡市某校2024年七年级新生学情检测物理试卷答案第二部分（待更新）

(1)关于本实验,下列说法正确的是AC。A.圆弧轨道不需要光滑B.滑块A是空心,滑块B是实心C.滑块A每次必须从同一位置由静止释放D.两滑块与水平轨道间的动摩擦因数可以不相等