PN Junction Diode MCQ’s

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “PN Junction Diode”.

1. What are the majority charge carriers in P-type semiconductors?
a) Electrons
b) Holes
c) Negative Ions
d) Positive Ions

2. What are present at the potential barrier of a PN junction when no external voltage is applied?
a) Electrons
b) Holes
c) Positive Ions
d) Positive and Negative Ions

3. How many PN junctions is/are present in a bipolar junction transistor?
a) 0
b) 1
c) 2
d) 3

4. Which is an example of Schottky diode?
a) MSP430G2ET
b) CMCP793V-500
c) SLB700A/06VA
d) MBR5H100MFST1G

5. When the p-type semiconductor is connected to positive terminal and n-type to negative terminal of a PN junction diode then the diode is said to be reverse biased.
a) True
b) False

6. Which is an example of PN junction diode?
a) Light Emitting Diode
b) Light dependent resistor
c) Photo Voltaic cell
d) Capacitor

7. Ions do not move in a PN junction.
a) True
b) False

8. What is the minimum voltage required to make the PN junction of a real silicon transistor in forward biased?
a) 0.7 volts
b) 0.8 volts
c) 0.9 volts
d) 0.3 volts

9. What are the parameters over which a diode characteristics curve is made?
a) Current and time
b) Voltage and time
c) Current and frequency
d) Voltage and current

10. What happens when a trivalent semiconductor is doped with a pure semiconductor?
a) N-Type extrinsic semiconductor is formed
b) P-Type extrinsic semiconductor is formed
c) PN junction is formed
d) NP junction is formed

11. Which impurity should be added to pure semiconductor to make a P-type semiconductor?
a) Arsenic
b) Phosphorus
c) Boron
d) Antimony

12. What are the majority charge carriers in N-type semiconductors?
a) Electrons
b) Holes
c) Negative Ions
d) Positive Ions

13. What happens when a pentavalent semiconductor is doped with a pure semiconductor?
a) N-Type extrinsic semiconductor is formed
b) P-Type extrinsic semiconductor is formed
c) PN junction is formed
d) NP junction is formed

14. Which impurity should be added to pure semiconductor to make an N-type semiconductor?
a) Gallium
b) Phosphorus
c) Indium
d) Aluminum

15. PN junction can be made by physically joining P type and N type semiconductor.
a) True
b) False

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