电路如图所示,当t=0时,闭合开关S,有UL1(0+) = U12(0+) =

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问题 电路如图所示,当t=0时,闭合开关S,有UL1(0+) = U12(0+) = 0,则UL1(0+)为( )。A. 1.5V B. 6V C. 3 V D. 7.5V

选项

答案C

解析解如图a)所示。[img]/upload/tiku/37/2011819_1.jpg[/img][img]/upload/tiku/37/2011819_1_1.jpg[/img]
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