MODULE 4.1 EXERCISES
SEMICONDUCTOR 1. Which picture shows a diode? (Page: 10) a)
c)
b)
d)
2. What is the forward voltage of silicon diodes? (Page: 6) a) 0,3V b) 0,5V c)
0,6V
d) 0,7V 3. Which of the following is incorrect for rectifier diode? a) Forward direction; anot to (+) and cathode to (-) b) Reverse direction; anot to (-) and cathode to (+) c)
Diode is the conductor companent
d) Unidirectional passes through the diode current 4. Which defines the internal structure of the diode? (Page: 8) a) PN junctional b) PNP junctional c)
NPN junctional
d) No one 5. Which of the following with temperature effect on diode is correct? (Page: 7) a) As temperature increases forward voltage is increased. b) As temperature increases reverse voltage is decreased. c)
Forward voltage is the directly proportional to the temperature.
d) Reverse voltage is the directly proportional to the temperature. 6. What is the barrier voltage of germanium diode? (Page: 5) a) 0,6V b) 0,3V c)
0,2V
d) 0,1V
7.
Which is the output signal of the circuit? (Page: 11)
+
+
t
a)
c) R
b)
R
R
d)
R
R
8.
a)
What is the following the output signal of the circuit?
c)
+
+
+
+
t
b)
t
d)
-
-
t
+
+
+
+ t
9.
Which is the output signal of the circuit? (Page: 12)
+
+
+ t
a) Half-Wave Rectification b) Full-Wave Rectification Half-Wave Signal
c)
d) Full-Wave Signal 10. Which is used to smooth the current after rectified? (Page: 13) a) Diode b) Resistor c)
Conductance
d) Capacitor
I)
II)
III)
11. Which picture shows a photo-diode? (Page: 13) a) I b) II c)
III
d) No one 12. Which picture shows a zener-diode? (Page: 20) a) I b) II c)
III
d) No one 13. Which does the abbreviation LED stand for? (Page: 13) a) Light Emitting Diodes b) Light Emitted Diodes c)
Light Emiter Diodes
d) Light Emiter Diode 14. LED diode forward voltage depends…………………..? a) …… on the color. b) …… the types. c)
…… the current.
d) ...... the power
15. What is zener-diode used for? (Page: 16) a) Inverting b) Full wave Rectifier c)
Half-Wave rectifier
d) To generate a reference voltage or Voltage stabiliser 16. How is bias of photo-diode? (Page: 19) a) Forward direction b) Reverse direction c)
Higher direction
d) No one 17. Which of the following photo-diode correct? (Page: 19) a) İs a light-emitting diode. b) The current is directly proportional the light intesity. c)
The resistance is directly proportional the light intesity.
d) Forward-bias is done. 18.
Which elements belong to the above symbol? (Page: 19)
a) VDR b) LDR c)
LED
d) Resistor 19. Which is incorrect for LDR work? (Page: 18) a) When the ligh intensity decreases the resistance increases. b) When the ligh intensity increases the resistance decreases. c)
They can be used for DC and AC circuits.
d) LDR is a type of diode. 20. LDR which is not used the application? (Page: 18) a) Rectifier b) Dimming switches c)
Photometers
d) Lighting control 21. What does the abbreviation VDR stand for? (Page: 20) a) Voltage Dependent Resistor b) Voltage Defenced Resistor c)
Varistor Dependent Resistor
d) Voltage Dependent Reactance 22. Which is incorrect for VDR? (Page: 20) a) İs called varistors b) The resistor increases when the voltage decreases. c)
The resistor decreases when the voltage increases.
d) Symbol is;
U
23. The symbol for SCR which option given is correct? (Page: 23) a)
A
b)
G
C
G C
A
a) Anot, Collector, Gate b) Voltage, Gate, Cathode Anot, Cathode, Gate
d) Current, Collector, Cathode 25. Which of the following is incorrect for SCR? (Page:22) a) Used as an electronic controlled switch. b) Thyristor also called c)
SCR; Silicon Controlled Rectifier
d) Passes current flow in both directions. 26. G
Symbol belonds to which element (Page: 27)
a) Triac b) Thyristor c)
Transistor
d) Transformer 27. Which element is over pass current in both directions? a) Diode b) Triac c)
VDR
d) Thristor
G
C
24. The tree regions of all SCR are? (Page: 22)
c)
c)
d)
C
A A
G
28. What is not correct for static resistance measurement? (Page: 27,28) a) Reverse resistance check b) Forward resistance check c)
Ampermeter is connected to the diode leads.
d) The test leads of the ohmmeter are co nnected to the diode. 29. Two silicon diodes are connected in series. What is the barrier voltage value? (Page: 29) a) 0,6V b) 0,2V c)
1,4V
d) 1,5V
30. Three germanium diodes are connected in series. What is the barrier voltage value? (Page: 29) a) 0,3V b) 0,6V c)
0,7V
d) 0,9V
CEVAP ANAHTARI 1. A 2. D 3. C 4. A 5. B 6. B 7. A 8. C 9. B 10. D 11. A 12. C 13. A 14. A 15. D 16. B 17. B 18. B 19. D 20. A 21. A 22. D 23. A 24. C 25. D 26. A 27. B 28. C 29. C 30. D
