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9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)

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9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)
9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)
9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)
9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)
9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)
9.3.1电场强度(练习题)(原卷版)_E015高中全科试卷_物理试题_必修3_2.同步练习_同步练习(第二套)_9.3.1电场强度(练习题)淘宝格致课堂(新人教版)

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第九章 静电场及其应用 9.3 电场 电场强度(一) 第 1 课时 电场强度 一、单选题: 1.有关电场强度的理解,下述说法正确的是( ) A.由E=可知,电场强度E跟放入的电荷q所受的电场力成正比 B.在电场中某点放入试探电荷q,该点的场强为E=,取走q后,该点场强不变 C.由E=k可知,在离点电荷很近,r接近于零时,电场强度无穷大 D.以点电荷Q为中心、r为半径的球面上各处的场强E相同 2.如图所示的是在一个电场中A、B、C、D四点分别引入试探电荷时,测得的试探电荷的电荷量跟 它所受静电力的函数关系图象,那么下列叙述正确的是( ) A.A、B、C、D四点电场强度大小相等 B.A、B、C、D四点的电场强度大小关系是E >E >E >E D A B C C.A、B、C、D四点的电场强度大小关系是E >E >E >E A B D C D.无法确定这四个点的电场强度大小关系 3.关于电场中某点的场强大小和方向的描述,下列说法正确的是( ) A.由E=知,若q减半,则该处电场强度为原来的2倍 B.由E=k知,E与Q成正比,与r2成反比 C.由E=k知,在以Q为球心,r为半径的球面上,各处场强均相同 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂D.电场中某点的场强方向就是该点所放电荷受到的电场力方向 4.如图所示,真空中O点有一点电荷,在它产生的电场中有A、B两点,A点的电场强度大小为E ,方向 A 与AB连线成60°角,B点的电场强度大小为E ,方向与AB连线成30°角。关于A、B两点电场强度大 B 小E 、E 的关系,以下结论正确的是( ) A B ❑√3 1 A.E = E B.E = E C.E =❑√3E D.E =3E A B A B A B A B 3 3 5.如图所示,M、N和P是以MN为直径的半圆弧上的三点,O点为半圆弧的圆心,∠MOP=90°.电 荷量相等、电性相反的两个点电荷分别置于M、N两点,这时O点电场强度的大小为E;若将N点 1 处的点电荷移至P点,则O点的电场强度的大小变为E。E 与E 之比为( ) 2 1 2 A.1∶ B.∶1 C.2∶ D.4∶ 6.如图所示,16个电荷量均为+q(q>0)的小球(可视为点电荷),均匀分布在半径为R的圆周上。 若将圆周上P点的一个小球的电荷量换成–2q,则圆心O点处的电场强度的大小为 A. B. C. D. 7.AB、CD为圆的两条相互垂直的直径,圆心为O,将带电荷量分别为+q、-q的两点电荷放在圆 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂周上关于AB对称且相距等于圆的半径的位置,如图136所示.要使圆心处的电场强度为零,可在 圆周上再放一个带适当电荷量的点电荷,则该点电荷( ) A.可放在C点,带电荷量为-q B.可放在D点,带电荷量为-q C.可放在A点,带电荷量为2q D.可放在D点,带电荷量为-2q 1 1 8.下列选项中的各 圆环大小相同,所带电荷量已在图中标出,且电荷均匀分布,各 圆环间彼此绝缘。 4 4 坐标原点O处电场强度最大的是( ) 二、多选题 9..在电场中的某点A放一试探电荷+q,它所受到的电场力大小为F,方向水平向右,则A点 的场强大小E =,方向水平向右.下列说法中正确的是( ) A A.在A点放一个负试探电荷,A点的场强方向变为水平向左 B.在A点放一个负试探电荷,它所受的电场力方向水平向左 C.在A点放置一个电荷量为2q的试探电荷,则A点的场强变为2E A D.在A点放置一个电荷量为2q的试探电荷,则它所受的电场力变为2F 10.如图所示,在点电荷Q的电场中,以点电荷Q为圆心的圆周上有A、B、C三点,A、C两点在同一直 径上。已知A点的电场方向水平向右。下列判断正确的是( ) 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂A.B点的电场方向水平向右 B.C点的电场方向水平向左 C.B、C两点的电场强度大小相等 D.B、C两点的电场强度大小不相等 11.如图所示,把A、B两个相同的导电小球分别用长为0.10 m的绝缘细线悬挂于O 和O 两点。用 A B 丝绸摩擦过的玻璃棒与A球接触,棒移开后将悬点O 移到O 点固定。两球接触后分开,平衡时距离 B A 为0.12 m。已测得每个小球质量是 ,带电小球可视为点电荷,重力加速度 , 静电力常量 ,则 A.两球所带电荷量相等 B.A球所受的静电力为1.0×10–2 N C.B球所带的电荷量为 D.A、B两球连线中点处的电场强度为0 12.如图甲所示,直线AB是某点电荷电场中的一条电场线。图乙是放在电场线上 a、b两点的电荷所 受电场力大小与电荷量间的函数图象。由此可以判定( ) 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂A.场源可能是正电荷,位置在点A左侧 B.场源可能是正电荷,位置在点B右侧 C.场源可能是负电荷,位置在点A左侧 D.场源可能是负电荷,位置在点B右侧 三、非选择题 13.在一带负电的导体A附近有一点B,如在B处放置一个q =-2.0×10-8 C的电荷,测出其受到 1 的静电力F 大小为4.0×10-6 N,方向如图2所示,则: 1 (1)B处场强多大?方向如何? (2)如果换成一个q=+4.0×10-7 C 的电荷放在B点,其受力多大?此时B处场强多大? 2 (3)如果将B处电荷拿走,B处的场强是多大? 14.如图所示,真空中xOy平面直角坐标系中的A、B、C三点构成等边三角形,边长L=2.0 m.将 带电荷量均为 q=+2.0×10-6 C 的两点电荷分别固定在 A、B 点,已知静电力常量 k=9×109 N·m2/C2,求: 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂(1)两点电荷间的库仑力大小; (2)C点的电场强度的大小和方向. 更多资料添加微信号:hiknow_007 淘宝搜索店铺:乐知课堂
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  1. CONNECT:[ UseTime:0.000808s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000920s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000275s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000254s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000451s ]
  6. SELECT * FROM `set` [ RunTime:0.000175s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000545s ]
  8. SELECT * FROM `wendang` WHERE `id` = 234251 LIMIT 1 [ RunTime:0.000443s ]
  9. UPDATE `wendang` SET `liulancishu` = 5 WHERE `id` = 234251 [ RunTime:0.000996s ]
  10. UPDATE `wendang` SET `lasttime` = 1772289666 WHERE `id` = 234251 [ RunTime:0.000575s ]
  11. SELECT * FROM `wendang` WHERE `id` < 234251 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000422s ]
  12. SELECT * FROM `wendang` WHERE `id` > 234251 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000381s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 234251 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000950s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 234251 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000863s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 234251 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000693s ]
0.078705s