20春学期《电工学》在线平时作业3

adminhan

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">2000</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">微法电容两端的电流<span lang="EN-US">i</span>为正弦波，其有效值为<span lang="EN-US">2</span>安培，角频率为<span lang="EN-US">1000rad/s</span>，当电感两端电压<span lang="EN-US">u</span>与电流<span lang="EN-US">i</span>方向关联时<span lang="EN-US">u</span>有效值为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>伏</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">2 </span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span style="mso-spacerun: yes">&nbsp;</span><span lang="EN-US">1</span></span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">一个电流为<span lang="EN-US">20A</span>的电流源和5欧姆电阻并联，可等效为一个电压源和电阻串联的电路。其中电压和电阻分别为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">4V</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">和5欧姆</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">100V</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">和5欧姆</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">100</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">微法电容的电压<span lang="EN-US">u=l4.l4Sin(l000t) V</span>，如果电流<span lang="EN-US">i</span>和电压<span lang="EN-US">u</span>为关联方向。则电容的电流<span lang="EN-US">i</span>的的角频率为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)rad/s</span></span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">159.2</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">1000 </span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">叠加定理适用于<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>电路。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">线性电路</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">非线性电路</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">一阶<span lang="EN-US">RL</span>串联电路中，<span lang="EN-US">R</span>为<span lang="EN-US">10</span>欧姆，电感初始电流为<span lang="EN-US">0A</span>，换路后外加电压为<span lang="EN-US">10V</span>，则电感的初始电压为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)A</span>。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">10 </span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">0</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">诺顿定理的等效电路是由<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>构或的。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电流源和入端电阻并联</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电流源和入端电阻串联 </span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">基尔霍夫电流定律的独立方程数为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">节点数+1</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">个</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">节点数-1</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">个</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">异步电动机的额定转矩<span lang="EN-US">T_N</span>表示电机在<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>的转矩。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">额定工作时</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">任何时候</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font face="宋体"><span style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.5pt" lang="EN-US">1</span><span style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.5pt">毫享电感两端的电流<span lang="EN-US">i</span>为正弦波，其有效值为<span lang="EN-US">1</span>安培，初相位为<span lang="EN-US">45</span>度，当电感两端电压<span lang="EN-US">u</span>与电流<span lang="EN-US">i</span>方向关联时<span lang="EN-US">u</span>初相位为<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>度<span lang="EN-US"><o:p></o:p></span></span></font></p>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">135</span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">-90</span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">对称星形三相电路的线电流和相电流的相量<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>。</span>
A:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">相同 </span>
B:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">不相同 </span>
C:<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">其它</span>

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">异步电功机的转速接近同步转速时，转差率接近为零</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<p style="LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font face="宋体"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-bidi-font-size: 10.5pt">异步电功机的</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-bidi-font-size: 14.0pt; text-shadow: auto">转子作用是产生电磁转矩，并输出机械能。</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-bidi-font-size: 10.5pt" lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)<o:p></o:p></span></font></p>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电阻<span lang="EN-US">R₁</span>和电阻<span lang="EN-US">R₂</span>并联的等效电阻<span lang="EN-US">1/R=1/R₁+1/R₂</span>。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">换路定律指出换路瞬间<span lang="EN-US">u_C(0₊)=u_C(0_-)(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当电阻元件的电流I和电压U是关联方向时，该元件吸收的动率是<span lang="EN-US">P=-UI</span>。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; text-shadow: auto">熔断器</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">是是一种热过载保护电器。</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">换路定律指出换路瞬间<span lang="EN-US">u_R(0₊)=u_R(0_-)(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Courier New'; mso-bidi-font-weight: bold; mso-text-raise: -3.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 12.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">零点漂移信号在阻容耦合放大电路中不会被逐级被放大，因而问题并不突出。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 16.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; text-shadow: auto">按钮</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">是用于接通和断开控制电路的手动切换电器。</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Courier New'; mso-bidi-font-weight: bold; mso-text-raise: -3.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 12.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">正反馈会使放大器的放大倍数增大。</span><span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 14.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold; mso-text-raise: -3.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 12.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">相量反映了正弦量的大小和初相位。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确

<span style="POSITION: relative; LAYOUT-GRID-MODE: line; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; TOP: 3pt; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-text-raise: -3.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电压源和电流源串联的等效电路是一个电压源。<span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</span></span>
A:错误
B:正确