【判断题】【消耗次数:1】
在非正弦周期电流电路中,感抗和容抗对各次谐波的反应是不同的。
正确
错误
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相关题目
【判断题】 非正弦周期电流电路的平均功率是直流分量功率和各次谐波平均功率的叠加。
①  正确
②  错误
【判断题】 非正弦周期电流的有效值,等于它的直流电流的平方与各次谐波电流有效值的平方和的平方根。
①  正确
②  错误
【单选题】 纯电感正弦交流电路中,电压的有效值等于电流的有效值与感抗的乘积,在相位上电压比电流( )。
①  超前90°
②  超前120°
③  滞后90°
④  滞后120°
【单选题】 纯电容正弦交流电路中,电压的有效值等于电流的有效值与容抗的乘积,在相位上电压比电流( )。
①  超前90°
②  超前120°
③  滞后90°
④  滞后120°
【单选题】 在交流电路中,电感的感抗等于( )。
①  XL=ωL
②  XL=1/(ωL)
③  XL=L
【判断题】 在正弦稳态交流电路中,电感元件可以等效为电流源。
①  正确
②  错误
【判断题】 感抗和容抗随着电源频率的不同都要发生变化。
①  正确
②  错误
【判断题】 感抗和容抗与频率无关。
①  正确
②  错误
【判断题】 交流电路中,电容元件对交流呈现的容抗很小,有利于交流电流通过,称通交作用。
①  正确
②  错误
【单选题】 314μF电容元件用在100Hz的正弦交流电路中,所呈现的容抗值为()。
①  0.197Ω
②  31.8Ω
③  5.1Ω
随机题目
【单选题】 15. ______ is known to us all is that China has launched Shenzhou V spaceship successfully.
①  That
②  What
③  It
④  As
【单选题】 14.He hasnt come yet.What do you consider _______ to him?
①  happens
②  hashappened
③  happening
④  tohappen
【单选题】 16.—Youve made great progress in your studies of English, havent you? ---Yes, but much.
①  remainstodo
②  isremainedtodo
③  remainstobedone
④  isremainedtobedone
【单选题】 18. ______ the Atlantic Ocean crosses the equator, the trade winds cause a flow of water to the west.
①  That
②  When
③  Where
④  Though
【单选题】 13. Unfortunately, when I dropped in, Doctor Li _____ for Beijing to join in the fight again SARS, so we only had time for a few words.
①  justleft
②  hasjustleft
③  isjustleaving
④  wasjustleaving
【单选题】 21. — When will you leave for Paris for a visit? — next month.
①  Until
②  After
③  At
④  In
【单选题】 27. For quite _____ students,their teachers advice is more important than _____ of their parents.
①  few;one
②  afew;that
③  alittle;some
④  alot;many
【单选题】 23. Never _______ forget the days when _______ together with you.
①  shallI;Ilived
②  shallI;didIlive
③  Ishall;Ilived
④  Ishall;didIlived
【单选题】 28. "_____ your meeting is!" he offered them his sincere congratulations.
①  Howagreatsuccess
②  Whatagreatsuccess
③  Howgreatsuccess
④  Whatgreatsuccess
【单选题】 24. Why didnt you tell me there was no meeting today? I _____ all the way here _____the heavy snow.
①  neednthavedriven;though
②  canthavedriven;across
③  mustnthavedriven;through
④  shouldnthavedriven;cross