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【单选题】
电路如图 所示, 稳压管 D Z 起稳幅作用,其稳定电压± U Z =± 6V 。试估算:输出电压不失真情况下的有效值。( )
A.
6V
B.
6.36V
C.
4.24V
D.
12.73V
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B.
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D.
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A.
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A.
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C.
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D.
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A.
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B.
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