【判断题】【消耗次数:1】
中线的作用就是使不对称Y接负载的端电压保持对称。
正确
错误
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相关题目
【单选题】 在三相交流电路的不对称星型连接中,中线的作用是
①  使不对称的相电流保持对称
②  使不对称的相电压保持对称
③  使输出功率更大
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【判断题】 三相电路中,中线的作用是使每相负载的相电压对称。
①  正确
②  错误
【单选题】 无零序电流分量的不对称短路是(  )
①  三相短路
②  两相短路
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【判断题】 三相交流电路中,无论负载是对称还是不对称,三相电路总的有功功率都等于各相负载的有功功率之和。
①  正确
②  错误
【单选题】 下列哪种连接方式采用上、下行不对称的高速数据调制技术().
①  ISDN
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③  ADSL
④  UML
【单选题】 下列哪种连接方式采用上、下行不对称的高速数据调制技术()。
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②  Cable Modem
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④  UML
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③  立方体网络
④  环网
【判断题】 不对称烯烃加硼烷时,硼原子加到含氢较少的碳原子上。
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随机题目
【单选题】 His mother _____alone since his father died.
①  lived
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①  20 minutes walk
②  20 minutes walk
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