云南开放大学电工电子技术(20秋)形考任务4答案

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发表于 2021-3-28 19:58:49 | 显示全部楼层 |阅读模式
电工电子技术(20秋)形考任务4
1.[单选] 交流接触器在电路中的文字符号是(    )
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    A.FU
    B.KM
    C.FR
    答:——B——
2.[单选题] 在直流电路中运用叠加定理时,不作用的电流源应(     )
    A.短路处理;     
    B.开路处理;   
    C.保留。
    答:——B——
3.[单选题] 当发现有人触电时,首先应(   )
    A.立即切断电源
    B.先采取保护措施然后切断电源
    C.用手将触电者拉离电源
    答:——A——
4.[单选题] 已知正弦量 <img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{1}=10sin(314t+{90}^{0})">A,<img class="kfformula" src="data:image/png;base64,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" data-latex="{i}_{2}=10sin(314t+{30}^{0})">A,则(    )<br><br>
    A.比超前60°
    B.比滞后60°
    C.不能判断相位差
    答:————
5.[单选题] 发光二极管正常工作时应在(    )
    A.正向导通区
    B.反向截止区
    C.反向击穿区
    答:————
6.[判断题] 异步电动机的转速永远小于旋转磁场的转速。
    A.对
    B.错
    答:————
7.[判断题] 变压器只能变换交流电压,不能变换直流电压
    A.对
    B.错
    答:————
8.[判断题] 在并联电路中,功率大的负载电阻小;功率小的负载电阻大。
    A.对
    B.错
    答:————
9.[判断题] 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
    答:————
10.[判断题] 电阻串联时,电阻值小的电阻通过的电流大。
    A.对
    B.错
    答:————
11.[填空题] 射极输出电路的特点是电压放大倍数 ##,输入阻抗##,输出阻抗##,因此在放大电路中主要用于 ##极和 ##级。
    答:————
12.[填空题] 实验时,功率表的电压线圈应##接在被测电路两端;电流线圈应##接在被测支路中,而且要注意两线圈的同名端要前置。
    答:————
13.[填空题] 任何一个完整的电路都必须有 ##、##和##三个基本组成部分。
    答:————
14.[问答题] 在RLC串联谐振电路中,已知L=500H、C=2000<img class="kfformula" src="data:image/png;base64,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" data-latex="{P}^{F}">、品质因数,电源电压有效值U=100mV,试求电路的谐振频率<img class="kfformula" src="data:image/png;base64,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" data-latex="{f}_{0}">,谐振时的电流<img class="kfformula" src="data:image/png;base64,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" data-latex="{I}_{0}">和电容上的电压<img class="kfformula" src="data:image/png;base64,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" data-latex="{U}_{c}">。
    答:————
15.[问答题] 简述三相异步电动机调速的方法。
    答:————

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