Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
V_0 = 100 V， R = 20 Omega 。共振处的最大电流是多少？
V_0 = 100 V， R = 20 Omega 。共振处的最大电流是多少？
Natural Language
Math Input
Extended Keyboard
