
線上學習扶助(三)
Quiz
•
Physics
•
11th Grade
•
Medium
杜謙 杜謙
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於OPA負回授接成放大器時,下列理想特性何者錯誤?
輸入端 反相、非反相之間虛短路
OPA的輸入阻抗無限大,因此電流無法灌入
OPA輸出阻抗無限大
放大倍率跟OPA本身無關
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
此圖為?
非反相放大器,放大公式為
反相放大器,放大公式為
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
此圖為非反相加法器的輸入端電路,請使用密爾門解V+為何?
(若電阻
R1 = R2 = R3 = 3k
,輸入電壓V1 = V2 = V3 = 3mV)
1mV
2mV
3mV
6mV
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
此圖為非反相加法器電路,若已知V+解出來等於3m V
若電阻
RN = 3k ,Rf= 24k
則輸出電壓Vo=?
-24mV
24mV
-27mV
27mV
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
此圖為?
非反相放大器,放大公式為
反相放大器,放大公式為
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如圖(3)所示為一減法器,若電阻R1 = R2 = R3 = 0.5 k,電阻Rf=4k,輸入電壓V1 = 10mV及V2 = 4 mV,試求V2經過分壓後解出V+為多少?
1mV
2mV
4mV
8mV
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
如圖(3)所示為一減法器,若電阻R1 = R2 = R3 = 0.5 k,電阻Rf=4k,輸入電壓V1 = 10mV及V2 = 4 mV,試求V2經過分壓後解出V+為2mV,請問是否可以直接等於V-?原因為何?
可以,因為短路
可以,因為虛短路
不可以
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