【单选题】
开关接1时，电流表中流过的短路电流为___。
A. 0A
B. 0.2A
C. 10A
D. 约等于0.2A
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答案
C
解析
暂无解析
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B. 40W 60W 100W
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18在单相桥式整流电容滤波电路中，设U2为其输入电压，输出电压的平均值约为___。
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【单选题】
20在半波整流电容滤波电路中，设U2为其输入电压，输出电压的平均值约为___。
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