如图所示的放大电路中，当用直流电压表测得UCE≈VCC时，有可能是因为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/55d8dc8717c540869306e29d4fe0b59e.png
举一反三
- 如图所示电路出现故障，测得VE=0，VC=VCC，则故障可能原因是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/4c87b9dd9f41422784da3bee4a3b5033.png
- 如图所示，试写出电压放大倍数表达式http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/a050c915d6ae4fa4b7fb4bba2a0bc777.png
- 下列化合物有旋光性的是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/42754375451947b4a2097a204914e285.png" border="0" vspace="0" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/259cc0f9369441888e4306c19039152f.png" border="0" vspace="0" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/c6798f5eb7e14df7a79f40cdd7d2f42e.png" border="0" vspace="0" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/4275928f484d4bad94705297fe159cf0.png" border="0" vspace="0" />
- 固定偏置的共射极放大电路，当用直流电压表测得UCE≈0时，可能是因为( )。
- 电路如图所示，该电路的闭环电压放大倍数为（ ）。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/bb902258a3e541f9a66886245e78fa05.png"/> A: 10 B: R C: 1 D: -1