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单选题 B-C9静电场-2.7 一半径为R的均匀带电圆环,电荷线密度为λ. 设无穷远处为电势零点,则圆环中心O点的电势U=
学科：大学物理B下
时间：2023-10-22 14:28:35
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题目1单选题
B-C9静电场-1.2 点电荷Q被曲面S所包围 , 从无穷远处引入另一点电荷q至曲面外一点,如图所示,则引入前后 <img src="https://tihai-oss-cloud.itihey.com/img/5919ca19c464b699f384e2341d9dce28.png">A. 曲面S的电场强度通量不变,曲面上各点场强不变B. 曲面S的电场强度通量变化,曲面上各点场强不变C. 曲面S的电场强度通量变化,曲面上各点场强变化D. 曲面S的电场强度通量不变,曲面上各点场强变化
题目2单选题
B-C9静电场-1.4 如图所示,任一闭合曲面S内有一点电荷q,O为S面上任一点,若将q由闭合曲面内的P点移到T点,且OP=OT,那么 <img src="https://tihai-oss-cloud.itihey.com/img/1babbbf68c90213e26a50dbc609ac12d.png">A. 穿过S面的电通量改变,O点的场强大小不变B. 穿过S面的电通量改变,O点的场强大小改变C. 穿过S面的电通量不变,O点的场强大小改变D. 穿过S面的电通量不变,O点的场强大小不变
题目3单选题
B-C9静电场-1.6 面积为S的空气平行板电容器,极板上分别带电量±q,若不考虑边缘效应,则两极板间的相互作用力为 <img src="https://tihai-oss-cloud.itihey.com/img/e9487455c57e6cedf801627d0fc8e1e4.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/393ace4fba55a1fb5f9e64e41ef0bd57.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/18fe5b47a7ec773ce5b7536010d64719.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/18b0291b3d73f642d42c9fa5f27bc8e3.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/93452add832fad7ef5fa7452834d5967.png">
题目4单选题
B-C9静电场-1.8 如图所示,两个同心的均匀带电球面,内球面半径为R1、带电荷Q1,外球面半径为R2、带有电荷Q2.设无穷远处为电势零点,则在内球面之内、距离球心为r 处的P 点的电势U 为 <img src="https://tihai-oss-cloud.itihey.com/img/7aa7250d218c19f24242d69e6c12e4c7.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/6362c274c6923d80cb53d74dba85b317.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/7f575ee3adee89b2f8f924dce0476a41.png">C. 0D. <img src="https://tihai-oss-cloud.itihey.com/img/9c73a919bad37e2a1b7cbc5f919907bc.png">
题目5单选题
B-C9静电场-1.10 在点电荷+q的电场中,若取图中P点处为电势零点,则M点的电势为 <img src="https://tihai-oss-cloud.itihey.com/img/845ebf3853784fe5f1211a4e576deb53.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/d522cbb665d6b70dc0e065baaf6884cd.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/cc8db6cf22179f3765371cd8a507b94a.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/83c290df10767eed8c9db8ee733e32a0.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/0db80af2b135ce02c9e2293364061684.png">
题目6单选题
B-C9静电场-1.12 真空中有一点电荷Q,在与它相距为r 的a 点处有一试验电荷q.现使试验电荷q 从a 点沿半圆弧轨道运动到b 点,如图所示.则电场力对q作功为 <img src="https://tihai-oss-cloud.itihey.com/img/3d84e30ac82a7a8cba0a9d927029d434.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/92ac1bdefe634f7903b4fa4393b32cdd.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/6ff67cf4da3350f447cb0caae4dea904.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/df33998c1d08ee845ae8f233420d9681.png">D. 0
题目7单选题
B-C9静电场-2.1 点电荷q1、q2、q3 和q4 在真空中的分布如图所示.图中S 为闭合曲面,则通过该闭合曲面的电场强度通量<img src="https://tihai-oss-cloud.itihey.com/img/5c0859c6267101bd2e7128d4768a7b86.png">=____________,式中的<img src="https://tihai-oss-cloud.itihey.com/img/c31f1ffb7a722f08ade22459350ce153.png">是点电荷_______在闭合曲面上任一点产生的场强的矢量和. <img src="https://tihai-oss-cloud.itihey.com/img/cb40f08b64a18419aaa2ab4c73b3728f.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/5cdc8f2b0b0447a60d2a39b04122fc04.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/03ddbfce31b29963093386bf6d03fc8e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/9ff66da888799a55c899e1d66bc54819.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/b1285ad151a907e85c56a02ff2cb5a1a.png">
题目8单选题
B-C9静电场-2.3 两个平行的"无限大"均匀带电平面, 其电荷面密度分别为+σ和+2σ,如图所示,则A、B、C三个区域的电场强度分别为:EA=__________________,EB=__________________,EC=_______________(设方向向右为正). <img src="https://tihai-oss-cloud.itihey.com/img/a6cdc637ee731dcbb678437ca5e40ba5.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/c7172242e85698216e085d1bbef7deea.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/c7172242e85698216e085d1bbef7deea.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/6c28b15620ed8a998cd41ba22b031102.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/d6eda89fa30758ec62fa164dab060e38.png">
题目9单选题
B-C9静电场-2.5 A,B为真空中两个平行的"无限大"均匀带电平面,已知两平面间的电场强度大小为E0,两平面外侧电场强度大小都为E03,则A,B两平面上的电荷面密度分别为σA=________,σB=________. <img src="https://tihai-oss-cloud.itihey.com/img/4741b25e231e68e720adf8cfe7822309.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/4ac8f4885fdc4cff49b63b0bb7b5173e.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/2cb6dd0550589c382d201b57274654ec.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/fce32a9a813f9ac2eff22a4eb0f00bfb.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/ad98092034f656a8142ccb9e948a3150.webp">
题目10单选题
B-C9静电场-2.7 一半径为R的均匀带电圆环,电荷线密度为λ. 设无穷远处为电势零点,则圆环中心O点的电势U=A. 0B. λ/ε0C. λR/ε0D. λ/(2ε0 )
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