
1102_電腦網路實習畢業考
Authored by 陳俊成 陳俊成
Computers
12th Grade
Used 3+ times

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35 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
如圖所示之電壓信號,頻率為50Hz,T為週期,脈波寬度為8ms,則此信號的平均值為何?
10V
5V
4V
2V
2.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
矽二極體的溫度在25°C時其障壁電壓VD為0.7V,且溫度每上升1°C,障壁電壓下降2.5mV,當VD為0.55V時,矽二極體溫度為何?
85°C
60°C
−45°C
−60°C
3.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
如圖所示電路,已知稽納二極體之崩潰電壓VZ = 5V、最大崩潰電流IZM = 9mA,若電路維持在正常穩壓狀態,則限流電阻R1最小值為何?
200Ω
300Ω
400Ω
500Ω
4.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
如圖所示電路,若BJT做開關動作使LED呈週期性閃爍,則此電路中的BJT操作模式為何?
飽和模式及主動模式
飽和模式及截止模式
主動模式及崩潰模式
主動模式及截止模式
5.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
如圖所示電路,BJT之切入電壓VBE = 0.7V、VCE = 0.2V且VCC = 10.2V、Vi = 5.7V、RB = 10kΩ、RC = 1kΩ,則電流IC為何?
0mA
0.5mA
5mA
10mA
6.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
有關BJT射極隨耦器之特性,下列敘述何者正確?
高輸入阻抗、高輸出阻抗
高輸入阻抗、低輸出阻抗
低輸入阻抗、高輸出阻抗
低輸入阻抗、低輸出阻抗
7.
MULTIPLE CHOICE QUESTION
15 mins • 3 pts
如圖所示電路,BJT之β = 50,切入電壓VBE = 0.7V,且VCC = 10.7V、RC = 1kΩ,若VCE = 5.7V,則RB應為何?
51kΩ
102kΩ
153kΩ
204kΩ
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