MOOC Electronics Technology (ElectrotechnicsⅡ)(Dalian University of Technology)1464171162 最新慕课完整章节测试答案
Chapter Eight DC Regulated Power Supply(Ⅱ)
文章目录
- Chapter Eight DC Regulated Power Supply(Ⅱ)
- Chapter Eight DC Regulated Power Supply(Ⅰ)
- Chapter Eleven Combinational Logic Circuits
- Chapter Nine Basic amplifier circuit(Ⅱ)
- Chapter Nine Basic amplifier circuit (Ⅰ)
- Chapter Ten Integrated Operational Amplifier (Ⅰ)
- Chapter Ten Integrated Operational Amplifier (Ⅱ)
- Chapter Thirteen Analog and Digital Signal Conversion
- Chapter Twelve Sequential Logic Circuits
Test for Chapter Eight
1、单选题：
A zener diode utilizes（ ） characteristics for its operation.
选项：
A: forward
B: reverse
C: both forward and reverse
D: none of the above
答案: 【 reverse】
2、单选题：
Given that UZ=10V, IZmax= 20 mA, UI =30V. Find the minimum value of R（ ）.
选项：
A: 1kW
B: 2kW
C: 0.5kW
D: 1.5kW
答案: 【 1kW】
3、单选题：
Given that UI =10 V, UZ = 6 V. Find the voltage drop across the resistor UR（ ）.
选项：
A: 10V
B: 6V
C: 4V
D: －4V
答案: 【 4V】
4、单选题：
Given that UZ1 =6V, UZ2 =12V. The forward voltage drop of the zener diode is 0.7V. Find UO =（ ）.
选项：
A: 18V
B: 6.7V
C: 30V
D: 12.7V
答案: 【 6.7V】
5、单选题：
Given that U2=10V. Find the maximum reverse voltage of the Diode.( ).
选项：
A: 10 V
B: 14.14V
C: 28.28 V
D: 20V
答案: 【 14.14V】
6、单选题：
Given that U2=10V.Find the maximum reverse voltage of the Diode ( ).
选项：
A: 0V
B: 10 V
C: 14.14V
D: 28.28 V
答案: 【 28.28 V】
7、单选题：
Given that U2=10V. Find the maximum reverse voltage of D1 ( ).
选项：
A: 0V
B: 10 V
C: 14.14V
D: 28.28 V
答案: 【 14.14V】
8、单选题：
Given that IO=50mA, Find ID( ).
选项：
A: 50 mA
B: 25 mA
C: 12.5 mA
D: 60 mA
答案: 【 25 mA 】
9、单选题：
Given that U2=35V, IO=12mA. Select the right Diode ( ).
选项：
A: a
B: b
C: c
D: d
答案: 【 c】
10、单选题：
Find the output voltage ( ).
选项：
A: 
9V
B: 5V
C: 12V
D: none of the above
答案: 【 5V】
随堂测验1
1、单选题：
Which of the following is not a full-wave rectifier？( )
选项：
A: 
B: 
C: 
D: 
答案: 【 】
2、单选题：
Which of the symbols in the Fig correctly represents a bridge rectifier?（ ）
选项：
A: 
B: 
C: 
D: 
答案: 【 】
3、单选题：
The most widely used rectifier is （ ）.
选项：
A: half-wave rectifier
B: centre-tap full-wave rectifier
C: bridge full-wave rectifier
D: none of the above
答案: 【 bridge full-wave rectifier】
4、单选题：
It is a ( ).
选项：
A: Voltage regulator
B: Half bridge rectifier
C: Transformer
D: Bridge rectifier
答案: 【 Bridge rectifier】
5、判断题：
The main disadvantages of Half-wave Rectifier :(1)Power loss; (2) Low output voltage; (3)The output contains a lot of ripples.
选项：
A: 正确
B: 错误
答案: 【 正确】
6、判断题：
The efficiency of a full-wave rectifier is higher than that of a half-wave rectifier. But the ripple in a full-wave rectifier is more than that in a half-wave rectifier.
选项：
A: 正确
B: 错误
答案: 【 错误】
随堂测验2
1、单选题：
A 10 V power supply would use( ) as filter capacitor.
选项：
A: air capacitor
B: mica capacitor
C: electrolytic capacitor
D: paper capacitor
答案: 【 electrolytic capacitor】
2、单选题：
Filter circuit is used to produce a smooth output voltage and increase the average value of Uo. The smoothness of the output depends on ( ).
选项：
A: RL
B: C
C: RLC
D: none of the above
答案: 【 RLC】
3、单选题：
Given that U2=20V. The output voltage when the load RL is open is( )V.
选项：
A: 20
B: 24
C: 48
D: 28.28
答案: 【 28.28】
4、单选题：
Given that U1=240V. If the step-down transformer has a turns ratio of 8:1. What is the output voltage ( )(Ignore diode drop).
选项：
A: 42.5V
B: 36V
C: 30V
D: 18V
答案: 【 36V】
随堂测验3
1、单选题：
A zener diode is usually used as ( ).
选项：
A: an amplifier
B: a voltage regulator
C: a rectifier
D: a multivibrator
答案: 【 a voltage regulator】
2、单选题：
A zener diode is always ( ) connected when it is used as a voltage regulator.
选项：
A: Reverse
B: Forward
C: either reverse or forward
D: none of the above
答案: 【 Reverse】
Chapter Eight DC Regulated Power Supply(Ⅰ)
Test for Chapter Eight (1)
1、单选题：
Determine the state of the diode.（ ）
选项：
A: on
B: cut off
C: can not determine
D: breakdown
答案: 【 on】
2、单选题：
The diode in the circuit is ideal. Given that US=5V. Find uO=（ ).
选项：
A: 5V
B: 2.5V
C: - 5V
D: 0V
答案: 【 5V】
3、单选题：
All the diodes in the circuit are ideal. Find the states of D1,D2,D3.( )
选项：
A: D1 on, D2 and D3 off
B: D1 and D2 off , D3 on
C: D1 and D3 off, D2 on
D: D1, D2 and D3 off
答案: 【 D1 on, D2 and D3 off】
4、单选题：
The diodes in the circuit are ideal. Find the states of D1 and D2.( )
选项：
A: D1 on, D2 off
B: D1 on, D2 on
C: D1 off, D2 on
D: D1 off , D2 off
答案: 【 D1 on, D2 off】
5、单选题：
The diode in the circuit is ideal. Given that ui = 6.5sinωt V，Find the maximum output voltage uOM =（ ）.
选项：
A: 6.5 V
B: 3.5 V
C: 3V
D: 9.5V
答案: 【 3.5 V 】
6、单选题：
The diodes in the circuit are ideal. Given that ui = 6 sinωtV，Find the maximum output voltage uo（ ）.
选项：
A: +1V
B: +4V
C: +6V
D: +2V
答案: 【 +6V】
7、单选题：
Given that the forward voltage drop across the diode is 0V. Find the output Uo = ( ).
选项：
A: 0V
B: +3V
C: -3V
D: none of the above
答案: 【 +3V】
8、单选题：
Given that the forward voltage drop across the diode is 0V. Find the output Uo = ( ).
选项：
A: 0V
B: +3V
C: -3V
D: none of the above
答案: 【 -3V】
9、单选题：
Given that the forward voltage drop across the diode is 0V. Find the output Uo = ( ).
选项：
A: 0V
B: +5V
C: -7V
D: none of the above
答案: 【 0V】
10、单选题：
Given that the forward voltage drop across the diode is 0V. Find the output Uo = ( ).
选项：
A: 0V
B: +5V
C: +10V
D: none of the above
答案: 【 0V】
随堂测验1
1、单选题：
Which of the following impurities could be used to convert intrinsic silicon to extrinsic P type silicon？( ) .
选项：
A: Aluminium
B: Germanium
C: Phosphorus
D: Nitrogen
答案: 【 Aluminium】
2、单选题：
There are two types of charge carriers