如图所示电路中,开关S闭合前电路为稳态,t=0时开关S闭合,则t>0时电容电压u

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问题 如图所示电路中,开关S闭合前电路为稳态,t=0时开关S闭合,则t>0时电容电压uc(t)为( )。

选项 A.3(1+e-10t)VB.5(1 + e-10t)VC.5(1-e-10t)VD.3(1-e-10t)V

答案C

解析解[img]/upload/tiku/139/342422_1.jpg[/img][img]/upload/tiku/139/342422_1_1.jpg[/img][img]/upload/tiku/139/342422_1_2.jpg[/img][img]/upload/tiku/139/342422_1_3.jpg[/img]
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