Semiconductor Principles MCQs : This section focuses on the "Semiconductor Principles". These Multiple Choice Questions (MCQs) should be practiced to improve the Semiconductor Principles skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Forward bias of a silicon P-N junction will produce a barrier voltage of approximately how many volts?
A. 0.2
B. 0.3
C. 0.7
D. 0.8
Question 2
How many valence electrons are in every semiconductor material?
A. 1
B. 2
C. 3
D. 4
Question 3
Intrinsic semiconductor material is characterized by a valence shell of how many electrons?
A. 1
B. 2
C. 4
D. 6
Question 4
Solid state devices were first manufactured during:
A. World War 2
B. 1904
C. 1907
D. 1960
Question 5
When and who discovered that more than one transistor could be constructed on a single piece of semiconductor material:
A. 1949, William Schockley
B. 1955, Walter Bratten
C. 1959, Robert Noyce
D. 1960, John Bardeen
Question 6
What can a semiconductor sense?
A. magnetism
B. temperature
C. pressure
D. all of the above
Question 7
What electrical characteristic of intrinsic semiconductor material is controlled by the addition of impurities?
A. conductivity
B. resistance
C. power
D. all of the above
Question 8
What is an energy gap?
A. the space between two orbital shells
B. the energy equal to the energy acquired by an electron passing a 1 V electric field
C. the energy band in which electrons can move freely
D. an energy level at which an electron can exist
Question 9
Which material may also be considered a semiconductor element?
A. carbon
B. ceramic
C. mica
D. argon
Question 10
Which semiconductor material is made from coal ash?
A. germanium
B. silicon
C. tin
D. carbon
Question 11
In "n" type material, majority carriers would be:
A. holes
B. dopants
C. slower
D. electrons
Question 12
In "p" type material, minority carriers would be:
A. holes
B. dopants
C. slower
D. electrons
Question 13
Minority carriers are many times activated by:
A. heat
B. pressure
C. dopants
D. forward bias
Question 14
Ionization within a P-N junction causes a layer on each side of the barrier called the:
A. junction
B. depletion region
C. barrier voltage
D. forward voltage
Question 15
Which of the following cannot actually move?
A. majority carriers
B. ions
C. holes
D. free electrons
Question 16
A P-N junction mimics a closed switch when it:
A. has a low junction resistance
B. is reverse biased
C. cannot overcome its barrier voltage
D. has a wide depletion region
Question 17
What causes the depletion region?
A. doping
B. diffusion
C. barrier potential
D. ions
Question 18
What is a type of doping material?
A. extrinsic semiconductor material
B. pentavalent material
C. n-type semiconductor
D. majority carriers
Question 19
A commonly used pentavalent material is:
A. arsenic
B. boron
C. gallium
D. neon
Question 20
Elements with 1, 2, or 3 valence electrons usually make excellent:
A. conductors
B. semiconductors
C. insulators
D. neutral
Question 21
If conductance increases as temperature increases, this is known as a:
A. positive coefficient
B. negative current flow
C. negative coefficient
D. positive resistance
Question 22
When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?
A. energy gap
B. hole
C. electron-hole pair
D. recombination
Question 23
Electron pair bonding occurs when atoms:
A. lack electrons
B. share holes
C. lack holes
D. share electrons
Question 24
What is the most significant development in electronics since World War II?
A. the development of color TV
B. the development of the diode
C. the development of the transistor
D. the development of the TRIAC
Question 25
Silicon atoms combine into an orderly pattern called a:
A. covalent bond
B. crystal
C. semiconductor
D. valence orbit
Question 26
When is a P-N junction formed?
A. in a depletion region
B. in a large reverse biased region
C. the point at which two opposite doped materials come together
D. whenever there is a forward voltage drop