【单选题】【消耗次数:1】
当输送功率一定时,电压越高,电流越大。
正确
错误
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相关题目
【单选题】 当变压器一次侧电压一定时,若二次侧电流增大,则一次侧电流将( )。
①  增大
②  减小
③  略有减小
④  不变
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①  正确
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【单选题】 传递一定功率的传动轴的转速越高,其横截面上所受的扭矩也就越大。( )
①  正确
②  错误
【判断题】 在外加电压一定时,光敏电阻的光电流大小随光照的增强而增加。
①  正确
②  错误
【判断题】 在一定的材料,当掺杂浓度一定时,温度越高,受激发的载流子将因此而增加。
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【单选题】 正态分布当μ恒定时,σ越大则
①  曲线沿横轴越向左移动
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③  曲线越“瘦高”
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【单选题】 定额水平越高,一定时期的劳动生产率()。
①  越高
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【判断题】 线性电阻电路中,电压、电流和功率都可以叠加。
①  正确
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随机题目
【单选题】 Noticeable changes of English words in recent years consist of the following characteristics EXCEPT___________ .
①  increasing use of abbreviation
②  increasing use of open compounds
③  increasing use of clauses
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【单选题】 Historical linguistics reveals that the English vocabulary sprang from three major root sources:_______.
①  Italian, Latin, Greek
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④  Germanic, Italian, French
【单选题】 How many morphemes are there in the word “farmers”?
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①  正确
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【判断题】 Two more newly emerged disciplines that are related to lexicology are computational lexicology and phraseology.
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【单选题】 Lexicology, a branch of linguistics, deals with_______of words.
①  the nature
②  the history
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①  General lexicology
②  Special lexicology
③  Historical lexicology
④  Descriptive lexicology