更多"[填空题]并列点两侧电压的瞬时值之差称为( )。"的相关试题:
[填空题]正弦整步电压是并列点两侧电压瞬时值之差的( )电压。
[单选题]并列断路器两侧电压瞬时值之差称为(____)。
A.滑差电压
$
B.$瞬时电压
$
C.$差分电压
$
D.$顺差电压
[判断题]并列点两侧电压的有效值之差称为滑差电压。( )
A.正确
B.错误
[判断题]纯电感正弦交流电路中的瞬时功率等于电流瞬时值与电压瞬时值的乘积
A.正确
B.错误
[单选题]并列断路器两侧电压矢量的电角速度之差称为(____)。
A.电压相角差 $
B.$电压矢量差
$
C.$滑差周期 $
D.$滑差角频率
[填空题]XDD0301C040Z 同期检察继电器的作用是防止同期并列点（ )过大时造成非同期合闸。
[单选题]在交流电路中，电压瞬时值和电流瞬时值的乘积叫做（）
A.平均功率
B.总功率
C.瞬时功率
D.以上都错
[单选题]电力系统中任一高次谐波的瞬时值不得超过同相基波电压瞬时值的（ ）。
A.0.01
B.0.02
C.0.05
D.0.1
[单选题]供电系统在正常运行下，某一节点的实际电压与系统标称电压之差对系统标称电压的百分数称为该节点的（ ）。
A.电压波动
B.电压变化
C.电压变动
D.电压偏差
[判断题]电力系统中任一高次谐波的瞬时值不得超过同相基波电压瞬时值的5%。（ ）
A.正确
B.错误
[判断题]某部分电路的端电压瞬时值为u，电流的瞬时值为i，并且两者有一致的正方向时，其瞬时功率p＝ui，则当p＞0时，表示该电路向外部电路送出能量；p＜0时，表示该电路从外部电路吸取能量。()
A.正确
B.错误
[判断题]交流电在某段时刻的值称为瞬时值
A.正确
B.错误
[单选题]
已知工频电压有效值和初始值均为380V，则该电压的
瞬时值表达式为（）。
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[判断题]交流电最大的瞬时值称为最大值，也称幅值或者峰值
A.正确
B.错误
[单选题]正弦整步电压瞬时值的最小值，可以用作判断(____)。
A.频率差条件
$
B.$电压差条件
$
C.$相角差条件
$
D.$频率差和相角差条件
[判断题]三相对称正弦电压的瞬时值之和为零。
A.正确
B.错误
[判断题] 感抗不能代表电压与电流瞬时值的比值。
A.正确
B.错误
