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.
Forward bias of a silicon P-N junction will produce a barrier voltage of approximately how many volts?
How many valence electrons are in every semiconductor material?
Intrinsic semiconductor material is characterized by a valence shell of how many electrons?
Solid state devices were first manufactured during:
A. World War 2
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
What can a semiconductor sense?
D. all of the above
What electrical characteristic of intrinsic semiconductor material is controlled by the addition of impurities?
D. all of the above
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
Which material may also be considered a semiconductor element?
Which semiconductor material is made from coal ash?
In "n" type material, majority carriers would be:
In "p" type material, minority carriers would be:
Minority carriers are many times activated by:
D. forward bias
Ionization within a P-N junction causes a layer on each side of the barrier called the:
B. depletion region
C. barrier voltage
D. forward voltage
Which of the following cannot actually move?
A. majority carriers
D. free electrons
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
What causes the depletion region?
C. barrier potential
What is a type of doping material?
A. extrinsic semiconductor material
B. pentavalent material
C. n-type semiconductor
D. majority carriers
A commonly used pentavalent material is:
Elements with 1, 2, or 3 valence electrons usually make excellent:
If conductance increases as temperature increases, this is known as a:
A. positive coefficient
B. negative current flow
C. negative coefficient
D. positive resistance
When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?
A. energy gap
C. electron-hole pair
Electron pair bonding occurs when atoms:
A. lack electrons
B. share holes
C. lack holes
D. share electrons
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
Silicon atoms combine into an orderly pattern called a:
A. covalent bond
D. valence orbit
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