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- 1. Multiple Choice
Which among these is NOT the property of a semiconductor?
Four electrons in the valence band forming covalent bonds
At 0 Kelvin semiconductor acts like an insulator
Semiconductors have two type of charge carriers
Semiconductors are temperature insensitive
- 2. Multiple Choice
Which among these is the fundamental characteristic of a p type semiconductor
Electrons are the majority charge carriers
Has a tendency to gain an electron
Has a tendency to donate an electron
Easy to conduct electricity
- 3. Multiple Choice
Method implemented to increase conductivity is
Increase electrical field
Increase temperature
Increase doping concentration
Shining light of proper wavelength on the semiconductor
All of the above
- 4. Multiple Choice
Which among these is NOT a semiconductor
Germanium
Silicon
Gallium Arsenide
Titanium
- 5. Multiple Choice
Which of the following DOES NOT hold good for a n type semiconductor
Electron concentration is greater than hole concentration
Obtained by doping an intrinsic semiconductor with a trivalent impurity
Dopants are Phosphorous or Arsenic
Minority charge carriers are holes
- 6. Multiple Choice
Electrons and holes are equal in magnitude but opposite in polarity
True
False
- 7. Fill in the Blank
The maximum energy that an electron in a metal has at the absolute zero temperature is called
- 8. Multiple Choice
Which semiconductor has higher conductivity at room temperature
Silicon
Germanium
Gallium Arsenide
- 9. Multiple Choice
Which charge carrier has higher mobility?
Electrons
Holes
Both electrons and holes
- 10. Fill in the Blank
The electric current produced due to the steady flow of electrons in one direction is called
- 11. Multiple Choice
An n type semiconductor is negatively charged
True
False
- 12. Multiple Choice
The ratio of majority and minority charge carriers in intrinsic semiconductors is unity
True
False
- 13. Multiple Choice
The forbidden energy gap for Silicon is of the order of
0.7 eV
0.3 eV
1.1 eV
10 eV
- 14. Multiple Choice
Which of the following is a symbol of NPN transistor ?
- 15. Multiple Choice
This is a graph that is seen on CRO. How is it change after full wave rectification process?
- 16. Multiple Choice
What is the name of this component?
PN junction
LED
silicon
PNP
- 17. Multiple ChoiceDiodeallows current to flow in one directionallows current to flow in two directionsis a resistor
- 18. Multiple Choice
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
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