Semiconductor Principles MCQs
Practice and Learn through MCQs and Quizzes. W3Definitions.com have 28 Semiconductor Principles MCQs
A commonly used pentavalent material is:
- A. arsenic
- B. boron
- C. gallium
- D. neon
- Correct Answer: Option A
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
- Correct Answer: Option A
Atoms that normally have three electrons in their outer shell are called __________________ atoms.
- A. trivalent
- B. pentavalent
- C. tetravalent
- D. charged
- Correct Answer: Option A
Electron pair bonding occurs when atoms:
- A. lack electrons
- B. share holes
- C. lack holes
- D. share electrons
- Correct Answer: Option D
Elements with 1, 2, or 3 valence electrons usually make excellent:
- A. conductors
- B. semiconductors
- C. insulators
- D. neutral
- Correct Answer: Option A
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
- Correct Answer: Option C
How many valence electrons are in every semiconductor material?
- A. 1
- B. 2
- C. 3
- D. 4
- Correct Answer: Option D
If conductance increases as temperature increases, this is known as a:
- A. positive coefficient
- B. negative current flow
- C. negative coefficient
- D. positive resistance
- Correct Answer: Option C
In “n” type material, majority carriers would be:
- A. holes
- B. dopants
- C. slower
- D. electrons
- Correct Answer: Option D
In “p” type material, minority carriers would be:
- A. holes
- B. dopants
- C. slower
- D. electrons
- Correct Answer: Option D
Intrinsic semiconductor material is characterized by a valence shell of how many electrons?
- A. 1
- B. 2
- C. 4
- D. 6
- Correct Answer: Option C
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
- Correct Answer: Option B
Minority carriers are many times activated by:
- A. heat
- B. pressure
- C. dopants
- D. forward bias
- Correct Answer: Option A
Reverse bias is a condition that essentially ___________ current through the diode.
- A. allows
- B. prevents
- C. increases
- D. blocks
- Correct Answer: Option B
Silicon atoms combine into an orderly pattern called a:
- A. covalent bond
- B. crystal
- C. semiconductor
- D. valence orbit
- Correct Answer: Option B
Solid state devices were first manufactured during:
- A. World War 2
- B. 1904
- C. 1907
- D. 1960
- Correct Answer: Option D
What can a semiconductor sense?
- A. magnetism
- B. temperature
- C. pressure
- D. all of the above
- Correct Answer: Option D
What causes the depletion region?
- A. doping
- B. diffusion
- C. barrier potential
- D. ions
- Correct Answer: Option B
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
- Correct Answer: Option A
What is a type of doping material?
- A. extrinsic semiconductor material
- B. pentavalent material
- C. n-type semiconductor
- D. majority carriers
- Correct Answer: Option B
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
- Correct Answer: Option A
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
- Correct Answer: Option C
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
- Correct Answer: Option B
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
- Correct Answer: Option C
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
- Correct Answer: Option C
Which material may also be considered a semiconductor element?
- A. carbon
- B. ceramic
- C. mica
- D. argon
- Correct Answer: Option A
Which of the following cannot actually move?
- A. majority carriers
- B. ions
- C. holes
- D. free electrons
- Correct Answer: Option B
Which semiconductor material is made from coal ash?
- A. germanium
- B. silicon
- C. tin
- D. carbon
- Correct Answer: Option A