WorksheetsQuiz 1- Semiconductor Diodes
Total questions: 17
Worksheet time: 11mins
A positive ion is formed when
(A) an atom gains an extra valence electron
(B) there are more holes than electrons in the outer orbit
(C) two atoms bond together
(D) a valence electron breaks away from the atom
Recombination is when
(A) an electron falls into a hole
(B) a positive and a negative ion bond together
(C) a crystal is formed
(D) a valence electron becomes a conduction electron
Holes in an n-type semiconductor are
(A) minority carriers that are thermally produced
(B) minority carriers that are produced by doping
(C) majority carriers that are thermally produced
(D) majority carriersthat are produced by doping
When a diode is forward-biased,
(A) the only current is hole current
(B) the only current is produced by majority carriers
(C) the only current is electron current
(D) the current is produced by both holes and electrons
The p and n regions are formed by a process called ionization
True
False
For operation in the linear or active region, the base
-colector junction of a
transistor is forward biased.
True
False
The process of adding an impurity to an intrinsic semiconductor is called
(A) doping
(B) recombination
(C) atomic modification
(D) ionization
What are the bias conditions of the base
-emitter and base-collector junctions
for a transistor to operate as an amplifier?
(A) Both are forward biased
(B) The base-emitter is forward and the base-collector is reverse
(C) Both are reverse biased
(D) The base-collector is forward and the base-emitter is reverse
What characteristic of the common
-collector amplifier makes it a useful
circuit?
(A) it has a high input resistance
(B) its output is in-phase with the input
(C) it has a high voltage gain
(D) it has a high power gain
Valence electrons exist in the outer shell of an atom
True
False
When reverse-biased, a diode ideally appears as a short.
True
False
The LED is normally operated in forward bias.
True
Flase
The base current and collector current are approximately equal.
True
False
A transistor in cutoff acts as an open switch.
True
False
The dc load line intersects the vertical axis of a transistor characteristic curve at
IC= VCE/RL.
True
False
Holes in an
n-type semiconductor are
(A) minority carriers that are
thermally produced
(B) minority carriers that are produced by
doping
(C) majority carriers that are
thermally produced
(D) majority carriers that are produced by
doping
When operated in cutoff and saturation, the transistor acts like a
(A) linear amplifier
(B) switch
(C) variable capacitor
(D) variable resistor
