西南大学网院17秋[0134]电动力学基础在线作业及答案
01341、同轴电缆线，电流I沿芯柱状导线流去，沿外壳筒状导线流回，则西南大学网院答案请咨询微信或QQ515224986
电磁场能量在内部柱状导线内，沿导线轴方向传播.
电磁场能量在内柱状导线与外壳筒状导线之间，沿导线轴方向传播
电磁场能量在外壳柱状导线上，沿导线轴方向传播.
电磁场能量在外壳柱状导线之外，沿导线轴方向传播.
参考答案：电磁场能量在内柱状导线与外壳筒状导线之间，沿导线轴方向传播；
2、一列火车静止时，长是1km，当这列火车以0.6c的速度行驶时，地面观察者观察到火车的长度是:
0.70km
0.80km
0.60km
0.90km
参考答案：0.80km；
3、（）一束光在介质1（光密）和介质2（光疏）的界面上发生全反射，设界面法向方向从介质1到介质2，下面说法错误的是
折射波在介质2中的穿透深度与数量级相当
折射波在介质2中是沿分界面的表面波
界面上沿法向方向的平均能流密度为零
如果介质2为真空，折射波的波速等于c
参考答案：折射波在介质2中的穿透深度与数量级相当；
4、关于麦克斯韦方程组，以下正确的是
电位移矢量的散度等于自由电荷密度与极化电荷密度之和
电位移矢量的旋度等于磁感随时间的偏微分的负值
磁场强度的旋度等于传导电流密度与位移电流密度之和.
磁感强度的散度为零
5、关于平面电磁波，则
磁感强度与电场强度存在相位差
波从一种介质传到另一介质波数k不变
电场能量密度等于电场能量密度
电场的旋度可以简化为：-i乘以角频率乘以电场强度
6、()若在垂直于以速度为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf2954bd5_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>，频率为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf295c463_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>的光源运动方向上观察，频率应是
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf296b890_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf2974cdd_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf297ceeb_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf298549f_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
7、()载流体矢势的多极展开，第二项是
载流体全部电流集中在原点的矢势
载流体磁矩的矢势
载流体磁四极矩的矢势
载流体磁八极矩的矢势
8、（）关于电偶极子辐射远场区，以下正确的是
辐射的功率与辐射频率有关
磁场有纵向分量
场的振幅与距离R<sup>2</sup>成反比
远场区场分布具有方向性
9、以下说法正确的是：
磁感应强度的无源性，引入了磁矢势。
电磁场中，电场E是无旋场。
<imgstyle="width:792px;height:39px;"title="201707201500531213257084872.jpg"alt="磁矢势A.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707201500531213257084872.jpg"width="1007"height="73"/>磁矢势
电场的散度可表示为<imgstyle="width:292px;height:45px;"title="201707201500531593248007863.jpg"alt="电场的散度.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707201500531593248007863.jpg"width="342"height="55"/>
10、关于相对论以下说法不正确的是
空间的尺度由于运动而收缩
对所有惯性系，真空中的光速为c
一切物理规律对惯性系等价，所以电场Ｅ和磁场Ｂ在任意观察者看是一样的
高速运动的粒子寿命更长
11、波导管中可以传播
可以传播TEM波
可以传播<imgclass="kfformula"src="data:image/png;base64,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"data-latex="{TM}_{10}"/>波
可以传播<imgclass="kfformula"src="data:image/png;base64,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"data-latex="{TE}_{00}"/>波
<imgclass="kfformula"src="data:image/png;base64,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"data-latex="{TE}_{11}"/>与<imgclass="kfformula"src="data:image/png;base64,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"data-latex="{TM}_{11}"/>波具有相同截止频率。
12、（）电磁波的能量密度w和能流密度S，以下表达式不正确的是：
真空中电磁场，能量密度：<imgclass="kfformula"src="data:image/png;base64,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"data-latex="\omega=\frac{1}{2}（{\epsilon}_{0}{E}^{2}+\frac{1}{{\mu}_{0}}{B}^{2})"/>
能流密度等于电场强度叉乘磁场强度：<imgclass="kfformula"src="data:image/png;base64,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"data-latex="S=E\timesH"/>
平面电磁波中，<imgclass="kfformula"src="data:image/png;base64,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"data-latex="\epsilon{E}^{2}=\frac{1}{\mu}{B}^{2}"/>
<br/>能流密度等于能量密度乘传播方向单位矢量：<imgclass="kfformula"src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHYAAAAtCAYAAAB77p8lAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAORSURBVHhe7ZlLqE1RGMevR5EiibxSNwqZSFFMyEBIRAaKMjIwUkpRJIkJA5KSUspAlHRNPCYYkAzk5hVFSSkjnSR5hf9P36rVsvfd55w6+56zfF/923uvx17r///W41t79/W5uQKugCvgCrgCroAr4Aq4Aq6AK+AKuAKugCvgCrgCroAr0LQCo5ou2fsFp4nCWOFLRGW87n8Zep9hxGBkVmz+JTNFSeeFS8JSYaPwUNgmTBKeC+My1yA7esvEqCEsSpiN1vMJy7udHevMCc0Uv6/CkhKe5P8W9mSuQ3b0jojR9QpWLMmrsmNuhHLdY3eI36sKp/1Q/pNcHZsrL5bZlwL7aZkd6GLyk0v6TjqRfWw8E/EPxbWLqbbWtQHbQy/rOq+1qh0rvV5vpj9Vttz6ToAXDKddE1YI74SVwizhgrDaOJK+v+rlvZ4/VwQaJhCzl0DqlrBJSEd8HVxxzAeBflUZZejzvajgWt3vsmfSeReO5sgWbKfVm13VQK/n48Ct5lAci1iAkR0LkvJkuXvRJgZVj/qpcW5uJQIn+GM2BuM+OAwuIHVgcCyz+b8xZsxC4ZE5N4z+ugQgQueIldrikkFG8BcPhItWMcxmHJ8azmfg9tdFqpvaYaZCvs4PE1PV3kCBCKTTl6KzNrOvaOZtsTrs17ExcJnFBIx/LbfjTtXx5aM43695pBG8xftlaH6Bbr4Jjwv6s0FprC6pEVhhT5MMBscYIczsrBzbL2KfmnAae2DVxwuOD+0i7cJ0JTQK+jVHaWeEn0keDv9ewmWz0jmfv03qrLPnG3adOKIJIXqlCMvTcWH+EB3m+/EdAVHfl5SboPR9bZLmz9GpxCnslzOEw9E72RIGhbvC9iidJfWKcFYITgrZBEtvhJPC7qTOZz03hHCefdBm/7uy2kH1ij2r7DMhYhIRI3SdxoDjeMKfJowry2yI1JmhGFH8OaFo2SY/7K9cY2MZjr97czSqm2NH9SRwIJJ8JqwxoUKD/LIjPRWlox2yl4cfEjiSYxROwLF8YGCg8fxaaAiUKTvrHrOyaT4Dg3cQbDHjb9q1Dm4db4N/qketFcjxNea0kbyqKyOYn+rDZWwB/HTAsfQlfP7DuSy9pLOEh1ld1M9DVqYoj1WB2b634h3Dxd/bdQVcAVfAFXAFXAFXwBVwBVwBV8AVcAVcAVfAFXAFXAFXwBVwBVwBV8AVcAVcAVcgGwX+ALfioKga71mGAAAAAElFTkSuQmCC"data-latex="S=\omegan"/>
13、（ ）对理想导体，静电平衡时，导体中电荷密度为0，电场随时间高速变化时，导体中
不为零
仍然为零
随电场的时间变化规律变化
由具体情况决定
14、关于电场的旋度，正确的是:
在静电场中，电场是有旋的。</p><p>
在静电场中，点电荷的电场环量为零。
电磁波在空间传播时，电场是无旋的。
电场的旋度与电场的环量无关。
15、横向多普勒效应是指
在相对论中,&"160;频率不随源的运动而改变
在相对论中,&"160;频率不仅在源运动方向上改变,也在垂直于运动的方向上改变
在相对论中,&"160;只有横波频率才随源的运动而改变
在相对论中,&"160;频率只随源的横向运动而改变
16、矩形波导管的边长分别为a和b,且a>b,则波的截止波长为
2a
2b
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf25433ae_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf254ba98_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"
17、一点电荷q位于一无限大水平接地平板导体之上,距离导体上表面a处,则点电荷的像的电量和位置为
q=q",距离上表面a,在导体面下侧,与q关于上表面对称
q=-q",距离上表面a,在导体面下侧,与q关于上表面对称
q=q"距离上表面,在导体面下侧a<sup>2</sup>,与q关于上表面不对称
q"=-2q,距离上表面a,在导体面下侧,与q关于上表面对称
18、关于带电粒子的辐射
只要高速运动的带电粒子总是会辐射的
切仑柯夫辐射是带电粒子在真空中的辐射
在真空中，只有加速运动的带电粒子才辐射
辐射场与成R<sup>2</sup>反比
19、（）关于相对论以下说法正确的是
光速无论在介质中还是在真空中都等于c
对所有惯性系，真空中的光速为c
一切物理规律对惯性系等价，所以电场Ｅ和磁场Ｂ在任意观察者看是一样的
一切物理规律对惯性系等价，所以惯性质量对任意观察者是一样的
20、（）动量流密度是张量，其中一个元素Tij是指
流过垂直于轴i的单位投影面的动量的j分量
流过单位面元垂直于j轴的投影面的动量的i分量
流过面元j的动量的i分量
流过面元的i动量的j分量
21、（ ）矩形谐振腔的边长的关系<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf22f9560_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>时，则
电磁波可以在腔中传播
可以存在任意频率的波
可以存在<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf23150a5_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>波
共振频率为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf23206b8_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>
22、（ ）已知海水的<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=10quiDe2c92e57_14bf22cdb26_USL&rc=3aqKG7odjMC9EAhsQ7JFAg%3D%3D"/>，则频率为10<sup>6</sup>赫时电磁波在海水中的透入深度为
72米
16毫米
0.5米
1.5米
23、（）电偶极辐射
辐射功率与频率的二次方成正比
辐射功率与频率的三次方成正比
电场与成r<sup>2</sup>反比
磁场与r成反比
24、（ ）对理想导体，静电平衡时,电力线与导体表面垂直，电场随时间高速变化时
与导体表面垂直
与导体表面平行
与导体表面既不平行也不垂直
由具体情况决定
25、（）以下说法正确的是
波导管内有截止频率限制，谐振腔内没有限制
若矩形波导管的边长a>b，则波导管内最大波长为2a
若谐振腔的边长有<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef81cdb1_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>，则最低频率为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef825162_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>
若矩形波导管的边长a>b，则波导管内最大波长为2b
26、（）关于电偶极子辐射远场区，以下正确的是
辐射的功率与辐射频率无关
磁场有纵向分量
场的振幅与距离R<sup>2</sup>成反比
远场区场分布具有方向性
27、（）对理想导体，稳恒电流情形时,电流线
与导体表面垂直
与导体表面平行
既不平行也不垂直
由具体情况决定
28、导体空腔静电屏蔽可由静电场的唯一性定理解释__________
内部不受外部影响，因为内部空间的电荷分布确定，内表面边界电势确定
内部不受外部影响，因为内部空间的电荷分布确定，内表面边界的电荷量确定
接地的导体空腔外部不受内部影响，因为空腔外表面电荷量确定
接地的导体空腔外部不受内部影响，因为内部空间的电荷分布确定
29、（）无限大接地平面导体，其像电荷有几个
1
2
3
4
30、（）接地的半径为R的导体球，球外距球心为a处有一电量为q的点电荷，则其像电荷的电量和位置为
电量为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef706cbf_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>;在球心和Q的联线上，距球心为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef70ee44_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>
电量为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef7217db_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>;在球心和Q的联线上，距球心为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef7285be_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>
电量为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef7348e9_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>;在球心和Q的联线上，距球心为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef7411a1_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>
电量为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef74e394_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>;在球心和Q的联线上，距球心为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef755c0c_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>
31、（）动量流密度是张量，其中一个元素<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef17cdda_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>是指
流过单位面元垂直于j轴的投影面的动量的i分量
流过面元j的动量的i分量
流过垂直于i轴的单位投影面的动量的j分量
流过面元i的动量的j分量
32、（ ）亥姆霍兹方程是定态谐波的基本方程，自由空间的方程形式是
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef12a011_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef133da3_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef13d4e1_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef14a138_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
33、（）如果波导管的尺寸为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef03879f_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"/>,则TE10波的截止波长为
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef0e5dfc_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef0ee618_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef0ff222_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef108b07_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
34、（ ）以下边值关系正确的是
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef00bfbb_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef01570e_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef01edba_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDx2c92e57_14bef027ba0_USL&rc=3aqKG7odjMDF5RFjpOZaHQ%3D%3D"
35、（）均匀电场中有一均匀介质球，则介质球上的极化电荷在球内空间的电场为
0
均匀电场
偶极子的电场
电四极矩的电场
36、（）关于电磁势的方程，以下哪一个方程总是正确的
<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201608261472178795145060781.jpg"title="201608261472178795145060781.jpg"alt="b.jpg"/>
<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201608261472178803282003853.jpg"title="201608261472178803282003853.jpg"alt="c.jpg"/>
<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201608261472178812113072490.jpg"title="201608261472178812113072490.jpg"alt="d.jpg"/>
<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201608261472178783873083014.jpg"title="201608261472178783873083014.jpg"alt="a.jpg"/>
37、以下物理现象描述正确的是
电磁波从空气入射到导体,电磁波频率越高,越是良导体,电磁波越能够进入导体内部.
当入射角大于布儒斯特角时,将发生全折射现象
电磁波在两介质分界面上发生全反射时,折射电磁波的振幅沿分界面法向指数衰减
自然光入射到两介质分界表面,反射光仍为自然光.
38、在波导管内
B.可以存在任意频率的波
可以存在TEM波
电场垂直于传播方向
电磁波的截止频率与波导管的尺寸有关
39、<imgstyle="width:901px;height:62px;"title="201707201500539158631010988.jpg"alt="在自由空间.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707201500539158631010988.jpg"width="976"height="57"/>电磁波
该电磁波的磁场沿z方向.
<imgclass="kfformula"src="data:image/png;base64,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"data-latex="\beta\omega"/>该电磁波的相速为
该电磁波的电场方向在xoy面内，与x轴成45°
该电磁波的传播方向为沿y轴.
40、关于接地导体球壳，以下说法正确的是
球壳外的电荷分布形式的改变对球壳内部空间的电场并无影响
如果改变球壳外部的电荷分布，则球壳内部空间的电场会发生变化
如果球壳内的电荷分布发生变化，则球壳外部空间的电场会发生改变
以上说法均不对
41、<imgtitle="201707111499760630854037130.jpg"alt="4.2.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707111499760630854037130.jpg"/>
A.√
B.×
42、<imgtitle="201707121499860046440035516.jpg"alt="能流密度为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499860046440035516.jpg"/>
A.√
B.×
43、超导的迈斯纳效应是指电阻率为零的效应。
A.√
B.×
44、<imgtitle="201707121499860142584004925.jpg"alt="泊松方程为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499860142584004925.jpg"/>
A.√
B.×
45、欧姆定律的微分形式为：J等于sigma乘以E，其中sigma为电荷面密度。
A.√
B.×
46、真空中的平面波，某时刻、某点处电场强度的值为其幅值，那么此时此地磁感强度的值为零。
A.√
B.×
47、根据高斯定理，高斯面上点的电场只由高斯面内的电荷决定，与高斯面外的电荷无关。（）
A.√
B.×
48、在两电介质分界面上，电场强度沿法向连续。
A.√
B.×
49、<imgtitle="201707111499760326753015679.jpg"alt="4.1.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707111499760326753015679.jpg"/>
A.√
B.×
50、四维空间的第四维表示为：。<imgclass="kfformula"src="data:image/png;base64,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"data-latex="{x}_{4}=ict"/>
A.√
B.×
51、引入电势概念的前提条件是静电场无旋。
A.√
B.×
52、沿Z轴传播的圆偏振电磁波，其电场x轴分量与y轴分量的相位差为零。
A.√
B.×
53、一个体积为V的正方体沿X轴匀速运动，地面上静止的人观察到它的体积小于V。
A.√
B.×
54、电导率越大，电磁波在导体表面的反射系数越趋近于1。
A.√
B.×
55、在两磁介质分界面上，磁感强度沿法向连续。
A.√
B.×
56、极化电荷可以在材料中自由移动。
A.√
B.×
57、地面上的观察者观察到静止光源和运动光源所发出的光的传播速度不同。
A.√
B.×
58、自然光入射到介质表面，反射光为部分偏振光。
A.√
B.×
59、运动的声音源将可能发生横向多普勒效应。
A.√
B.×
60、极化现象是发生于导体中的现象。
A.√
B.×
61、磁感应强度等于磁矢势的旋度。
A.√
B.×
62、<imgtitle="201707121499854076087078113.jpg"alt="良导体条件为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499854076087078113.jpg"/>
A.√
B.×
63、<imgtitle="201707121499859640136067408.jpg"alt="四维矢势为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499859640136067408.jpg"/>
A.√
B.×
64、在相对论中，物体的静能为：<imgstyle="width:127px;height:54px;"class="kfformula"src="data:image/png;base64,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"width="69"height="47"data-latex="{m}_{0}{c}^{2}"/>。
A.√
B.×
65、<imgtitle="201707121499855380703038925.jpg"alt="四维波矢为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499855380703038925.jpg"/>
A.√
B.×
66、能流密度是指单位体积内的能量。
A.√
B.×
67、<imgtitle="201707111499760776582016882.jpg"alt="4.3.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707111499760776582016882.jpg"/>
A.√
B.×
68、电多极矩法对电势展开，其展开的第一项是电偶极子的势。
A.√
B.×
69、洛仑兹力密度可以表示为：<imgclass="kfformula"src="data:image/png;base64,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"data-latex="f=pE+J\timesB\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,"/>
A.√
B.×
70、磁化电流是材料中的自由电荷定向移动产生的。
A.√
B.×
71、<imgtitle="201707121499859443167051459.jpg"alt="四维动量表示为.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499859443167051459.jpg"/>
A.√
B.×
72、电磁波进入良导体的穿透深度与电磁波频率无关。
A.√
B.×
73、相对物体静止的系中所观察到物理过程所用时间，比相对物体运动的系中所观察到更短。
A.√
B.×
74、<imgtitle="201707121499854714825076200.jpg"alt="四维矢量在洛仑兹变换下满足.jpg"src="/resourcefile/uploadFiles/file/questionImgs/201707121499854714825076200.jpg"/>
A.√
B.×
75、在一个惯性系下同时发生的两事件，在另一个惯性系下观察也一定同时发生。
A.√
B.×
76、全反射时，反射波电场与入射波电场的相位相同。
A.√
B.×
77、唯一性定理是指研究区域内电荷分布确定时，需要知道电势或电势法向导数的边界条件，研究区域内的电场分布有唯一确定解。
A.√
B.×
78、电多极矩法对电势展开，其展开的第三项是电四极子的势。
A.√
B.×
79、在无传导电流的两磁介质分界面上，磁场强度沿法向连续。
A.√
B.×
80、一个长尺沿X轴静止放置，静止于尺的人和相对于尺沿X轴匀速运动的人观察到尺的长度不相同。
A.√
B.×
81、静止长度为相对于地面运行。车厢的后壁以速度向前推出一个小球，求地面的观察者测得小球从后壁到前壁的运动时间。
82、一平行板电容器两极板相距为d，其间为空气，已知一极板电势为零，另一极板电势为U(如图)，略去边缘效应，试求两极板间的电势，并由求电场强度．<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quiDw2c92e57_14be46b4465_USL&rc=3aqKG7odjMAieLkB0J2PYQ%3D%3D"/>
83、有一导体球,半径为R,电势为φ0,距球心b>R处有一点电荷q,求导体外的电势
84、平行板电容器内有两层介质，厚度分别为l1和l2，介电常数为ε1，ε2，如介质漏电，电导率分别σ1为和σ2，试求在电流达到稳恒时，两级间电流密度。设两极间电动势为ε。
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