电路如图所示，则含源一端口的戴维宁等效电阻为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/f7b1c117013a4796be2d662d0c0f5a31.png
举一反三
- 如图所示无源一端口的等效阻抗为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5cf2c5ff940e4131b8fb6688552f5fd0.png
- 如图所示无源一端口的等效阻抗为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5cf2c5ff940e4131b8fb6688552f5fd0.png
- 如图所示电路的等效电阻Rab=2Ω。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/d2872874ac4a4a29a10bd8dbf3a8d2d7.png
- 电路如图5所示，运算放大器构成 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/ad0dc8cc2e8547ccb31a035a818c1d8d.png
- 如图所示电路，端口的输入电阻为（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/d98ab65818b047beb7603a190135ae10.png