电工电子技术（19秋）形考作业3

adminhan

电感元件两端的电压与（&nbsp;&nbsp;&nbsp; ）成正比。<br><br>
A:电流的瞬时值
B:电流的平均值
C:电流的变化率<br><br>

基本放大电路中，经过晶体管中的信号（&nbsp;&nbsp;&nbsp; ）。<br><br>
A:只有直流成分
B:只有交流成分
C:交直流成分均有<br><br>

能量转换过程不可逆的那部分功率通常称为（&nbsp;&nbsp;&nbsp; ）<br><br>
A:有功功率
B:无功功率&nbsp;
C:视在功率<br><br>

已知两正弦量<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{1}=10sin（314t+{90}^{0}）">&nbsp;A，<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{2}=10sin(628t+{30}^{0})">A，则（&nbsp;&nbsp;&nbsp; ）<br><br>
A:<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{1}">比<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{2}">超前60°
B:<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{1}">比<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{2}">滞后60°&nbsp;&nbsp;
C:不能判断相位差<br><br>

纯净半导体中掺入五价元素后成为（&nbsp;&nbsp;&nbsp; ）<br><br>
A:本征半导体&nbsp;
B:N型半导体
C:P型半导体<br><br>

电子实验室测量电子技术实验电路中的电压时，用的是（&nbsp;&nbsp;&nbsp; ）<br><br>
A:万用表的电压档
B:交流电压表&nbsp; &nbsp;
C:电子毫伏表&nbsp;<br><br>

具有直接复位端&nbsp;<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098051295292212464029.png" title="1575354762(1).png" alt="1575354762(1).png">和置位端<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098051801736393586214.png" title="1575354769(1).png" alt="1575354769(1).png"> &nbsp;的触发器，CP作用时两个端子应为（&nbsp;&nbsp;&nbsp; ）<br><br>
A:<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098052478512261153296.png" title="1575354762(1).png" alt="1575354762(1).png"><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098052872333329659691.png" title="1575354769(1).png" alt="1575354769(1).png">=11
B:<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098053960846789140313.png" title="1575354762(1).png" alt="1575354762(1).png"><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098054225065487314848.png" title="1575354769(1).png" alt="1575354769(1).png">=00
C:<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098054912925634352663.png" title="1575354762(1).png" alt="1575354762(1).png"><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098055111441952432580.png" title="1575354769(1).png" alt="1575354769(1).png">=10

共发射极放大电路的反馈元件是（&nbsp;&nbsp;&nbsp; ）。<br><br>
A:电阻<img class="kfformula" src="data:image/png;base64,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" data-latex="{R}_{B}">
B:电阻<img class="kfformula" src="data:image/png;base64,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" data-latex="{R}_{E}">
C:电阻<img class="kfformula" src="data:image/png;base64,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" data-latex="{R}_{C}">

将电气设备的金属外壳接到电力系统的零线上，这种保护方式称为（&nbsp;&nbsp;&nbsp; ）。
A:工作接地&nbsp;
B:保护接地
C:保护接零<br><br>

熔断器在电路中起过流保护，其控制图上标注的文字符号是（&nbsp; &nbsp;&nbsp;）<br><br>
A:FU
B:KM
C:KM

电度表是测量电能的仪表。&nbsp;
A:对
B:错

光电二极管和稳压二极管一样，也是工作在反向击穿区。&nbsp;
A:对
B:错

三相异步电动机的旋转方向，取决于通入定子绕组中三相电流的相序。
A:对
B:错

可控RS触发器具有“置0、置1、保持和翻转”四种逻辑功能。&nbsp;
A:对
B:错

模拟电路传输的信号是连续的，数字电路传输的信号是离散的。
A:对
B:错

在照明电路的三相四线制中，中线是不可以省去的。&nbsp;
A:对
B:错

三相四线制电路有功功率的测量，负载不对称可以采用一表法进行测量。
A:对
B:错

三个最大值相同，角频率相等，相位上互差120o的正弦量称对称三相交流电。
A:对
B:错

电子线路测量电压时，可用万用表的电压档或交流电压表进行测量。
A:对
B:错

感性设备的功率因数较低，并联电容后可提高设备自身的功率因数。&nbsp;
A:对
B:错

已知正弦电压<img class="kfformula" src="data:image/png;base64,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" data-latex="u=220\sqrt {2}sin(314t-{60}^{。})V">，则它的最大值是&nbsp;##V，有效值<br>是&nbsp;##V，角频率是##rad/s，初相是##度。<br><br>
A:310&nbsp;
B:220
C:314
D:60

根据转子结构的不同，三相异步电动机分有&nbsp;##式和##式两类。<br><br>
A:笼型
B:绕线型

对称三相电源星联结的特点是&nbsp;##；三角形联接的特点是&nbsp;##。<br><br>
A:<img class="kfformula" src="data:image/png;base64,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" data-latex="{U}_{1}=\sqrt {3}{U}_{P}">
B:<img class="kfformula" src="data:image/png;base64,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" data-latex="{U}_{1}={U}_{P}">

寄存器是由具有存储功能&nbsp;&nbsp;&nbsp;##的组合起来构成的，一个触发器可以存储##位二进制代码。<br><br>
A:触发器
B:1

电流流经人体内部对内脏器官的伤害称为##。
A:电击

火线与火线之间的电压称为&nbsp;##电压，火线与零线之间的电压称为##电压。<br><br>
A:线
B:相

线性应用的集成运算放大器都是采用的&nbsp;##反馈。<br><br>
A:负

<img class="kfformula" src="data:image/png;base64,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" data-latex="{(27)}_{10}">＝（##）2＝（##）8＝（##）16。
A:11011
B:44
C:1B

单相桥式整流电路输出电压的平均值与变压器二次绕组电压有效值之间的关系是##。<br><br>
A:<img class="kfformula" src="data:image/png;base64,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" data-latex="{U}_{0}=0.9{U}_{2}" width="100" height="30" border="0" vspace="0" title="" alt="" style="width: 100px; height: 30px;">

##的半导体称为本征半导体，掺入&nbsp;##的半导体称为掺杂半导体。<br><br>
A:纯净
B:杂质

用“与非门”实现逻辑函数式<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098225012142775369702.png" title="1575356639(1).png" alt="1575356639(1).png">，写出化简后有逻辑式，并画出逻辑电路图。<br><br>
A:解： &nbsp;<br><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098229727006631758053.png" title="1575356671(1).png" alt="1575356671(1).png"><br>逻辑图如下：<br><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098230297924614795754.png" title="1575356688(1).png" alt="1575356688(1).png">

电路如图所示。用叠加定理计算1Ω支路中的电流。<br><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098205044353552996773.png" title="1575356443(1).png" alt="1575356443(1).png"><br><br>
A:（１）当2A电流源单独作用，6V电压源不作用（相当于短路）时，得：<img class="kfformula" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMwAAAA4CAYAAACxIRf9AAAIh0lEQVR4Xu2cZ6x1RRWGn48OUgJKJBjpCEYRDIgktFCjEBBpAgIqEKSoBBGDIEgLXaSEZoDQW4xGiKKAASyUGAkB6SVYwAKCYAGkmSfMJpubc+49s+8+u3xnTXJ/3HtnZu95Z96Ztd61Zs8hSiAQCIyMwJyRa0bFQCAQIAgTiyAQyEAgCJMBVlQNBIIwsQYCgQwEgjAZYEXVQCAIE2sgEMhAIAiTAVZUDQSCMLEGAoEMBIIwGWBF1UAgCBNrIBDIQCAIkwFWVA0EgjCxBgKBDASCMBlgRdVAIAhTfQ0sDOwNPA+sC7wAnAb8p3qXE9HSNfch4M99xCoIU22Nitu+wO+B3wDvAb6XSHMk8L9q3U5Eq48B3wX2Bx7v24i7TpiVgC2A69Ji7Aq+7wO+Bpxc2iW3BY4CdunjQmgIWDeWE9OJvHsfceo6YQ4G1ga+2jHCrAJcA5wPXJgW2/rAjcCWwF0NLcC+PWYH4P3ANmlO44SpcQb1EfQJfgbcUGO/dXTlRrM48HLJ/Noe+DrgzvlUHQ+Zy/pYAfgMcEuaVzfBIEyNk/zBtACP7djpMmiIkudM4HfAOcBbNeIwN3Q1H/AV4EfAQsAZccLkTev8gDvyGsAnUtPXkhP9J+CqHpCkGLGnzeeB1YCT+qj85E1dpdobA0slwohTHYTRHzoFuAO4stJbVWjUtg+zQFpk+iratz+sMIa2m2wErAecnUy0tt+neP48wCZJNFG18z01hy4GnmnwJZcGvgCclzaTugijuPJ94FTguKbG0zZhVJsuB1YGdgTua2rgNT1nw6T4nJvIshzw7xSbqekRlbpxXvcA/g78PJmIiwGHJxJ9CXioUs/5jZzjj5aafQA4IG0wDwP3A29kdmsfrhs3BFU3pfzcPjIf+Xb1tgmjJv8D4NE0wQb/+lLcKVXEVMl0/sVSR/anHXBmP5JOFk+98kIqFtpzwJdbMntne8LoDymuuAF8G7gA0EJxDsZe2ibM55I82+guUQOqmhlO1Gen9PWTjhBfB/vOJEKUX9H5PiLt8Eq7ihRNlg8DnwIOAo5JQV83y5yyDrApcDdwW9pw9wFezOmkat02CTNvsj2/laTYxhy3qmA11E7FzUV9LXDPNM907pRpXYRGzovsAlUof98spe6YiVAuChRX9BRzsdGs9ORcNGH01yS6/KOJ+WmTMEskc8aAXxu7XRP4VnmGc+LJpXn3jSGnwHR13IjcwfdKZtdUwuwJXJrIdn2VF2ypTaFG/gv4MbB8UlNVy7RUHmnivdokzOop5eVvwG7As00MuCfPmI4Qxf8OSYTS9Bq1FKf6dsBOwAOjNuxAPQOfqm1Kyfor701y8rLAzoACwthLm4Qx98qdwqTFwzITFnX4jgckXW55JZk8Jk52uQwixmzI4lhXBK4GfgF8B3i9BICxsUMBYyZVivKusvU4io6+p63rpVD3FknBYv2XDZI/NI5nv6vPtghTOJ/q5+4al419pNM/wBhFm+WXQx5eJoiLeRmgysli9y46HW0VNBUyT/ZxllxMh2HgO9qXoYdLSlkUha+mRK0v14h52RZhPCFMIdm8I/7LkuNcOSP0PZ2cXpDmBOC/wIFJARuh23eq2Meu6UcF7Q85jSvWzcV0GAb2oxViBogxrnKRSFs1KWC0RZgi21cHTtWmychzxflvrZlzpFNr2o2X1aoQRjPL6wjGL5ogS11gOfYvAk8Ag04gT0ozxlXODE2MvbRFGO+43AQYIdfE0K/oUlHn91qBdnkd5ePpNHUXNdh5+ohXAMrO/zcBE1JzTTKj7JLs6AbMsGFYmUfmwv9jMq1UtsTgnzOAu2q6X6Sj/+qAuoVErqnpz9iTXtsijJFZAdsvBQBzF+W4nH4XV3HE6xzXsWup7pjyb2xEdUcynpX+du80Ax+klOU6/cZoxFiBpKxC6gt5Oc/ExaKMy+k3X1CH3UxlHXavbWhi/SXF4d4cgsGCSQzy3tEwydiQxK+bjPa3QZhC3dDM+HRT6kYmI81NUkGaiTAuPBMvjfCbbT2o6DuY06UyZSniTwYlh/Vfh6zsRS1jMWYkaMqVi7a/C/LmTFyqVC/kX1Ogist24vvJGbIiPIkVKMxsHnZyiL2WivlyjUT72yBMIW2a42T8pYs29aiEMS9KU0NzYJhZaSaDp4r1ni7tsI5/kDmaE7gcZp5JFhVIF5N5Y+ViLMbAqJm+TSW7GpU3E8GfIkPdk8WMhkGmlie95HJ8UwOv5bE0HstrijCmmiv9CYR3YNxl/ZvO3IMpn8xduCulTsK4QDRDXko7parPRcDtyTSbunvONjXG50kWfZ5hxXhJW8FiE249WRUgppparg/fe+t0f+ZX6XbmVMlYc9INyFNKbN24PMFvTdH/sX25pynCdIUIo75HnYSZ+kxNDReFn2jq4uk6Kka59fTlimvKmmf6T2N30nNfcqb6QZjBCI2LMPo8ysNKoZP6oQx9J0UInX6vdTdyj2UmIoz6/yDM6IQpzEo/QlcU5dI1U4ygPPGKAFNTb5RSPVlM75guC3nUuetzPcMKmmW9+yRVEGZ0wgyqOYrTbzvJos0ukSSLu6zmyWPAMFm1z4Qov/taKcnWwKlfALL09pNUQZjxE8YcLv2V35ZOluK2pvc65vbixmA6jieKd1Zcc0rAhhSM1PcqSz0I8+7l6h0LTS4/A2tRejXY5neAq54wxccaDLaWi3/3ktgkFE8ZvxLk6WpcxiwKvzn3ZN8GH4SZ3YyNapLN7inRujMIBGFmNxWaW8YBzKLtnUQ6u6FPZusgzGTOe4y6IgJBmIrARbPJRCAIM5nzHqOuiEAQpiJw0WwyEQjCTOa8x6grIhCEqQhcNJtMBIIwkznvMeqKCARhKgIXzSYTgSDMZM57jLoiAkGYisBFs8lEIAgzmfMeo66IwP8BebSmSMpfYF0AAAAASUVORK5CYII=" data-latex="{I}^{'}=\frac {2} {1+2}\times 2=\frac {4} {3}A"><br>（２）当6V电压源单独作用，2A电流源不作用（相当于开路）时，得：<img class="kfformula" src="data:image/png;base64,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" data-latex="{I}^{''}=\frac {1} {1+2}\times 6=2A"><br>（３）由叠加定理得：<img class="kfformula" src="data:image/png;base64,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" data-latex="I={I}^{'}+{I}^{''}=\frac {4} {3}+2=3\frac {1} {3}A"><br><br>

什么是零点漂移？产生零点漂移的主要原因是什么？<br><br>
A:人们在实验中发现，在直接耦合放大电路中，即使将输入端短路，用灵敏的直流表测量出输出端也会有变化缓慢的输出电压，这种输入电压为零而输出电压不为零的现象称为零点漂移现象。产生零点漂移的主要原因有：电源电压的波动、元件的老化、半导体器件参数随温度变化而产生的变化等。<br><br>

化简下列逻辑表达式：<br><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098193049862346402244.png" title="1575356322(1).png" alt="1575356322(1).png"><br><br>
A:<img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098195246784457857790.png" title="1575356342(1).png" alt="1575356342(1).png">

判断如图所示电路的反馈类型．<br><img src="http://file.open.com.cn/ueditorupload/image/2019/12/03/6371098188127793506158988.png" title="1575356273(1).png" alt="1575356273(1).png">
A:电流串联负反馈。