30 Questions
What happens to the resistance of a semiconductor when a trivalent impurity is added?
Increases
What is responsible for conduction in semiconductors?
Electrons
How many terminals does a PN junction diode have?
2
What symbol represents the anode terminal of a PN junction diode?
What happens to the resistance of a pure semiconductor when it is heated?
Goes down
What does the addition of a pentavalent impurity to a semiconductor create?
Free electrons
In semiconductor manufacturing, what is the process of drawing a circuit design onto a wafer called?
Photolithography
What is the glass substrate with a computer-designed circuit pattern called in semiconductor manufacturing?
Photomask
Which of the following processes in semiconductor manufacturing involves spraying oxygen or water vapor on the wafer surface to form an oxide film?
Oxidation
When chemical solutions are used for etching in semiconductor manufacturing, what is this process called?
Wet etching
Which term best describes the resultant silicon rod after the semiconductor manufacturing process?
Ingot
What type of etching uses gas or plasma for material removal in semiconductor manufacturing?
Dry etching
What is the type of semiconductor material that has an equal number of electrons and holes?
Intrinsic
What is the minimum voltage required to produce a large forward current in a silicon diode?
0.7 V
Which of the following materials has the highest thermal conductivity?
Silver
What is the barrier potential of a silicon diode at room temperature?
0.7 V
Which of the following elements has four valence electrons and is classified as an elemental semiconductor?
Germanium (Ge)
Why is copper preferred over silver for making conducting wires?
Copper is cheaper than silver
What is the charge of a hole in a semiconductor?
A charge of +1 unit
How many protons are there in the nucleus of a copper atom?
29
What causes the holes in an intrinsic semiconductor at room temperature?
Thermal energy
What is the merging of a free electron and a hole called?
Recombination
How does an intrinsic silicon crystal act at room temperature?
Like a conductor
What is the valence electron of a conductor also called?
Free electron
What is the movement of free electrons in a conductor called?
Current
What is the boundary between p-type material and n-type material called?
A pn junction
As the forward current through a silicon diode increases, what happens to the internal resistance?
It decreases
What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
Recombination
What types of impurity atoms are added to increase the number of conduction-band electrons in intrinsic silicon?
Pentavalent
Which factor(s) does the barrier potential of a pn junction depend on?
All of the above
Test your knowledge on electrical conductors, semiconductor devices, diodes, and insulators with this quiz. Questions cover topics like free electron movement, p-n junctions, diode properties, and characteristics of insulators.
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