(2/2)是否是用英文的呢?还是文字呢?就是因为这一点我不知道所以要你们指点!谢谢你们曾经看轻我!

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谁能告诉我容抗Xc=1/(2πfc)怎么算一般电路都用到容抗,有一点我不知道,就是Xc=1/(2πfc)得的是电容对交流的阻碍的一个值吗?还是所得的电流或电压.比如说.220V交流接一个500K电阻与400V0.68np的电容并联在接一个二极管输出.可得到多少的电压和电流.怎么算.我是这样算的1/(2*3.14*50*0.68)=0.004683电阻值太大我就大概不算上去了.算出的0.004683是Xc吗?怎么这么小的,还是我算错了,希望哪位大哥帮帮忙,谢谢
ycycrfv5704
你忘了,电容的单位是n(F),要转换成F(法拉),还差3个“0”呢。(如果是pF,则差6个“0”)。电路分析还要记住一个原则:电阻、电容、电感如果并联,则两端电压向量是相同点;如果三者串联,则电流向量是相同的。把握这个原则,分析时才不会出错。
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