【单选题】【消耗次数:1】
用万用表交流电压档测量交流电压时,所测的数值是交流电压的()。
最大值
平均值
有效值
瞬时值
参考答案:
复制
纠错
相关题目
【单选题】 数字万用表测量交流电压时的读数为。
①  最大值
②  有效值
③  瞬时值
④  峰-峰值
【判断题】 用交流电压表和交流电流表所测出的值是有效值。
①  正确
②  错误
【单选题】 指针式万用表的交流电压档实质上是_______。
①  分贝电压表
②  峰值电压表
③  有效值电压表
④  均值电压表
【单选题】 交流电压表.交流电流表测量的是()。
①  最大值
②  有效值
③  瞬间值
【判断题】 交流电流表和电压表测量所测得的值都是有效值。
①  正确
②  错误
【判断题】 交流电表测得交流电的数值是平均值。
①  正确
②  错误
【单选题】 实验室中的交流电压表和电流表,其读值是交流电的( )。
①  最大值
②  有效值
③  瞬时值
【单选题】 实验室中的交流电压表和电流表,其读值是交流电的()。
①  最大值
②  有效值
③  瞬时值
【判断题】 将交流电变换成脉动直流电的电路称为整流电路,全波整流电路输出的直流电压平均值等于输入的交流电压(即变压器副边电压)有效值的0.9倍。
①  正确
②  错误
【单选题】 通常用交流仪表测量的是交流电源、电压的
①  幅值
②  平均值
③  有效值
④  瞬时值
随机题目
【单选题】 Which of the following is NOT right about Mark Twains style of language?
①  His sentence structures are long, ungrammatical and difficult to read.
②  His words are colloquial, concrete and direct in effect.
③  His humor is remarkable and characterized by puns, straight-faced exaggeration, repetition and anti-climax.
④  His style of language had exerted rather deep influence on the contemporary writers.
【判断题】 The Transcendentalist group includes two of the most significant writers America has produced so far, Emerson and Henry David Thoreau.
①  正确
②  错误
【判断题】 At the Reason and Revolution Period, Americans were influenced by the European movement called Romanticism Movement.
①  正确
②  错误
【判断题】 In the novel Moby Dick, the rebellious struggle of Captain Ahab was thought to be against the white whale.
①  正确
②  错误
【判断题】 In William Cullen Bryant’s poem “Thanatopsis”, the title means view of death.
①  正确
②  错误
【单选题】 About the novel The Scarlet Letter, which of the following statements is NOT right?
①  Its very hard to say that it is a love story or a story of sin.
②  Its a highly symbolic story and the author is a master of symbolism.
③  Its mainly about the moral, emotional and psychological effects of the sin upon the main characters and the people in general.
④  In it the letter A takes the same symbolic meaning throughout the novel.
【单选题】 In the novel Moby Dick, the rebellious struggle of Captain Ahab was thought to be against ____.
①  the white whale
②  the gliding great demon of the seas of life
③  the overwhelming, mysterious vastness of the universe and the awesome forces
④  the savage harpooners and the motley crew
【单选题】 The Romantic Period in American literature stretches from the end of the 18th century to the outbreak of _________.
①  the Revolutionary War
②  the Civil War
③  the War for Independence
④  World War
【单选题】 As a great innovator in American literature, Walt Whitman wrote his poetry in an unconventional style which is now called free verse, which is ______.
①  lyrical poetry with chanting refrains
②  poetry without a fixed beat or regular rhyme scheme
③  poetry without rhymes at the end of the lines but with a fixed beat
④  poetry in an irregular metric form and expressing noble feelings
【单选题】 Washington Irving’s_________ became the first work by an American writer to win financial success on both sides of the Atlantic in the first half of the 19th century.
①  Charles the Second
②  Sketch Book
③  The Scarlet Letter
④  Moby Dick I