如图所示的RLC并联电路，Im=5A,IRm=3A,
Icm=3A，则ILm=()。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/68a7a0759805493c9e99676fa0bf10bb.png
Icm=3A，则ILm=()。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/68a7a0759805493c9e99676fa0bf10bb.png
举一反三
- 一正弦交流电的电流有效值为3A，频率为50Hz，则此交流电路的瞬时值表达式可能是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/1dcc9d96be464445be16511f2c63a67a.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/cda5daad65384af3bae4c6bb6c32eba7.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/0d630fc323eb4dc6ac9f32ab1a9c89cc.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/5fa68f501144435b9a05ccdb8114c900.png" />
- 下列用量子数描述的、可以容纳电子数最多的电子亚层是……… （ ） A: n=4,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/770d7ff80ba34c14835ae968265b8730.png"/>=3 B: n=2,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/770d7ff80ba34c14835ae968265b8730.png"/>=1 C: n=3,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/770d7ff80ba34c14835ae968265b8730.png"/>=2 D: n=5,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/770d7ff80ba34c14835ae968265b8730.png"/>=0
- 如图，尺寸正确标注的图形是： A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/d7f5cc79b50247069cd9347901587ce7.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/25e08fdcfa8d42849b8cce450503b0ef.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/0dd480e6dba2481197db009c3b98eac9.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/0f8bb7ecb6c74b1290c04861b5c3f7b8.png">
- 电路如图4所示，电流I为。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/48dcfd6292e44a329c2d5b04973679d8.png" /> A: 0A B: –2.5A C: 3A D: –3A
- 下列极限中结果等于e的是（ ）. A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/38da1b07f5c0405ea6707c9e6594b6a5.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/eb7113c864f6405080daa91020fb9b6c.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/4513ad5298554e2eb426e127192851d8.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/9f89daefa1f445e295834ce3daac84cf.png">