两个电流源之间相互作用的安培力，并不一定满足牛顿第三定律。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/58778db7a19e475dbf1c165939c0a171.png
举一反三
- 两个电流源之间相互作用的安培力，并不一定满足牛顿第三定律。https://ima...bf1c165939c0a171.png
- 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">
- 已知逻辑函数<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/db3f3ede53184bb3a37a766a36125eab.png" /> 与其相等的函数为 ____。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/b9f375a5635e41d6911d97ab27bfe708.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/bc54dac1e08f483e88b86be39ec320b1.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/da4ddc58a62f4f35b2fe27419d3e7023.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/9aea77b2ed814b77aed36f7301cd7625.png" />
- 电容两端的电压和通过电容的电流关系用公式可表示为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/d078cb7d10e44c4f8c05aaaefe2f11c4.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/26033dd1f6c340ab9f40ef1fb6a9ca74.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/c288b6d305c4423887f79f8a6e7dd4b0.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/e482cdd3839a42f4a03ecd8b9dcd20aa.png">