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桥式整流电路，输入交流电压的有效值为10V，则输出直流电压约为（ ）。

A.5V
【参考答案】

B. 9V 解析：桥式整流电路是一种将交流电（AC）转换为直流电（DC）的电路。在桥式整流电路中，每个半周期都有两个二......

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