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【简答题】
以下是降压式开关电源,分析电路,回答以下问题 : 1当开关管VT导通时,二极管VD ,输入的整流电压经VT和L向 充电,这一电流使电感L中的储能增加;当开关管VT截止时,电感L感应出左 右 的电压,经负载RL和二极管 释放电感L中存储的能量,维持输出电压不变。 2电路输出电压的高低由加在VT基极上的脉冲 确定。 3输出电压Uo与输入电压Ui的关系为Ui Uo。
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皮皮学刷刷变学霸
举一反三
【判断题】Stating capacity in dollar amounts generally results in a consistent measure of capacity regardless of the actual units of measure.
A.
正确
B.
错误
【判断题】People in the United States with good educational backgrounds speak in a similar manner regardless of the region of the country.
A.
正确
B.
错误
【单选题】Costs that remain the same in total regardless of the level of business activity are called:
A.
Sunk costs
B.
Variable costs
C.
Fixed Costs
D.
Frozen costs
【简答题】Regardless of the presence of the President, Professor Truman frankly pointed out the ________ in the planning of the capital city.(deficient)
【简答题】为了使测量误差尽可能小,应该如何设置示波器的水平和垂直档位值?
【单选题】A strategy that is the same regardless of the action of the other player in a game is a _____ strategy.
A.
competitive
B.
trigger
C.
dominant
D.
tit-for-tat
【单选题】In which of the following stages of moral development do individuals value rights of others and upholding absolute values and rights regardless of the majority's opinion?
A.
preconventional stage
B.
conventional stage
C.
principled stage
D.
established stage
【简答题】大声说出来(两词词组)
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