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