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起止时间:2021-04-12到2021-06-30
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Chapter 2： Learn the Principles of Diodes Easily and Joyfully Qiuz on Diodes
1、 As shown in the figure, if power supply voltage is +5 volts and the forward voltage drop of the LED is +1.8 volts, what is the voltage across the resistor R1? (volt, voltage to Ground at TP1)
A:3
B:4.2
C:3.2
D:1.8
答案: 3.2
2、 As shown in the figure, if power supply voltage is +3 volts and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (volt, voltage to Ground at TP1)
A:5.0
B:4.2
C:3.0
D:1.0
答案: 1.0
3、 
As shown in the figure, if power supply voltage is +3 volts and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:5
B:0
C:3
D:1
答案: 0
4、 As shown in the figure, if power supply voltage is +10 volts and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:0
B:5
C:10
D:12
答案: 0
5、 
As shown in the figure, if power supply voltage is +1.5 volts and the forward voltage drop of the Schottky diode is +0.3 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:1.8
B:1.5
C:1.7
D:1.2
答案: 1.5
6、 
As shown in the figure, if power supply voltage is -3 volts and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:5.0
B:-4.2
C:-5.0
D:-1.0
答案: -1.0
7、 As shown in the figure, if power supply voltage is -1.0 volt and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:3.0
B:-1.0
C:-3.0
D:0
答案: 0
8、 As shown in the figure, if power supply voltage is +0.5 volts and the forward voltage drop of the LED is +2.0 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:1.5
B:2.5
C:3.0
D:0.0
答案: 0.0
9、 
As shown in the figure, if power supply voltage is +50 volts and the forward voltage drop of the LED is +2.0 volts and breakdown voltage VBR is -30 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:30
B:20
C:0
D:80
答案: 20
10、 As shown in the figure, if power supply voltage is +15 volts and the forward voltage drop of the Schottky diode is +0.3 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:15
B:18
C:12
D:10
答案: 15
11、 
As shown in the figure, if power supply voltage is +15 volts and the forward voltage drop of the Schottky diode is +0.3 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:18
B:15
C:0.7
D:0.3
答案: 0.3
12、 
As shown in the figure, if power supply voltage is -15 volts and the forward voltage drop of the Schottky diode is +0.3 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:18
B:-15
C:15
D:-15.3
答案: -15
13、 
As shown in the figure, if power supply voltage is -15 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:7
B:-0.7
C:15
D:-9
答案: -0.7
14、 As shown in the figure, if power supply voltage is -0.4 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the diode? (voltage to Ground at TP1)
A:9.4
B:-0.4
C:0.7
D:-9.4
答案: -0.4
15、 
As shown in the figure, if power supply voltage is +5 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:5
B:0
C:-4
D:4
答案: 0
16、 As shown in the figure, if power supply voltage is +15 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:15
B:0
C:-6
D:6
答案: 6
17、 
As shown in the figure, if power supply voltage is +15 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:15.7
B:24
C:-6
D:14.3
答案: 14.3
18、 As shown in the figure, if power supply voltage is +0.5 volts and breakdown voltage VBR of the Zener diode is -9 volts, what is the voltage across the resistor R1? (voltage to Ground at TP1)
A:9.6V
B:0V
C:-6V
D:8.5V
答案: 0V
19、 
As shown in the figure, if power supply voltage is +0.5 volts and the forward voltage drop of the LED is +2.0 volts, what is the current flowing through the resistor R1?
A:0mA
B:5mA
C:15mA
D:0Volt
答案: 0mA
20、 As shown in the figure, if power supply voltage is +5 volts and the forward voltage drop of the LED is +2.0 volts, what is the current flowing through the resistor R1?
A:10mA
B:5mA
C:15mA
D:20mA
答案: 10mA
21、 As shown in the figure, if power supply voltage is +10 volts and the forward voltage drop of the LED is +2.0 volts, what is the power consumption of the LED?
A:23mW
B:53mW
C:100mW
D:88mW
答案: 53mW
22、 As shown in the figure, if the allowable power consumption of the LED is 100 milliwatts and the forward voltage drop of it is +2.0 volts, what is the power supply voltage that may damage the LED?
A:20v
B:10v
C:16v
D:15v
答案: 20v
Chapter 3 The Concept of Impedance Quiz on impedance
1、 There is a signal generator with a nominal output impedance of 600Ω. The output voltage without load is 2 volts. If connect a load resistor of 1000Ω to the generator, what is the voltage across the 1000Ω resistor?
A:2.5V
B:1.0V
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