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- 1. Multiple Choice
An atom consists of
one nucleus and only one electron
one nucleus and one or more electrons
protons, electrons and neutrons
answer (b) and (c)
- 2. Multiple Choice
The nucleus of an atom is made up of
protons and neutrons
electrons
electrons and protons
electrons and neutrons
- 3. Multiple Choice
The most widely used semi-conductive material in electronic device
germanium
carbon
cooper
silicon
- 4. Multiple Choice
The energy band in which free electrons exist is the
first band
second band
conductive band
valence band
- 5. Multiple Choice3. Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?(a) BoronArsenicIndiumGallium
- 6. Multiple Choice
Doping of Semiconductors
materials which can conduct electricity better than insulator, but not as well as conductors.
The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
when 4 electrons in outermost orbit.
- 7. Multiple Choice
The characteristics of p-type semiconductors is includes
Majority carriers are electron
Has tendency to gain electron
Has tendency to donor electron
Easy to conduct electricity
- 8. Multiple Choice
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
- 9. Multiple Choice
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
- 10. Multiple Choice
Which is not one of the properties of semiconductor?
4 electrons in outermost orbit, in covalent bonding.
atoms vibrate causes electron to break free from the bonds.
Electron free leaves hole.
Semiconductor has 2 types of charge carriers.
all of the above are the properties of it
- 11. Multiple Choice
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
- 12. Multiple Choice
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
- 13. Multiple Choice
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
- 14. Multiple Choice
What is a semiconductor?
A non-metal with strong covalent bonds that oppose the flow of current.
A person who directs the performance of an orchestra or choir.
A substance with an electrical conductivity that can act as either a conductor or an insulator depending on the circumstance.
- 15. Multiple Choice
Amount of energy that Valence electron must have in order to jump from Valence band to conduction band is called
energy gap
energy band
energy baud
energy core
- 16. Multiple Choice
Semiconductor material doped with pentavalent impurity is called
positive type
p-type
n-type
negative type
- 17. Multiple Choice
Copper, silver and gold are good
insulators
semiconductors
conductors
super insulators
- 18. Multiple Choice
In p-type material, majority carriers are
holes
electrons
current
electricity
- 19. Multiple Choice3. Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?(a) BoronArsenicIndiumGallium
- 20. Multiple Choice
Intrinsic semiconductors are of
4 types
3 types
2 types
1 type
- 21. Multiple Choice
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
- 22. Multiple Choice
The most widely used semi-conductive material in electronic device
germanium
carbon
cooper
silicon
- 23. Multiple Choice
The current in a semiconductor is produced by
electron only
holes only
negative ions
both electrons and holes
- 24. Multiple Choice
The process of adding an impurity to an intrinsic semiconductor is called
doping
recombination
atomic modification
ionization
- 25. Multiple Choice
The majority carrier in an n-type semiconductor are
holes
valences electrons
conduction electrons
protons
- 26. Multiple Choice
How is conduction increased in an p-type semiconductor?
by increased applied electrical field
by decreased applied electrical field
by the availability of extra holes
by the availability of donor electrons
- 27. Multiple Choice
Solar (or PV) cells are made of many individuals cell stacked together, and these are made of materials called ______________.
diodes
electrometals
semiconductors
solarductors
- 28. Multiple Choice
Solar cells first became a practical energy source for NASA for what application?
Space Shuttle
Rocket boosters
Rovers
Satellites
- 29. Multiple Choice
In order to create higher current, solar cells are connected in ______________.
inverters
series
parallel
wires
- 30. Multiple Choice
In order to increase voltage, several solar cells are connected in __________________.
inverters
wires
parallel
series
- 31. Multiple Choice
What is the amount of energy required to free an outer shell electron from its orbit to a free state?
band gap
electron volt
wavelength
photovoltaic
- 32. Multiple Choice
The material with the biggest forbidden gap is called
Insulator
Conductor
Semi-conductor
- 33. Multiple Choice3. Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?(a) BoronArsenicIndiumGallium
- 34. Multiple Choice
Intrinsic semiconductor at room temperature will have, ................. available for conduction
Electrons
Holes
Both electrons and holes
None of the above
- 35. Multiple Choice
Intrinsic semiconductors are those
Which have high conductivity
Which have more electrons than holes
Which have more holes than electrons
Which are made of semiconductor material in its purest form
- 36. Multiple Choice
Intrinsic semiconductors are those
Which have high conductivity
Which have more electrons than holes
Which have more holes than electrons
Which are made of semiconductor material in its purest form
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