ELE404 MODULE 2 - BIPOLAR JUNCTION TRANSISTORS
(BJTS) QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW!!
What are the two types of BJTs? Ans✓✓✓NPN and PNP transistors.
What does BJT stand for? Ans✓✓✓Bipolar Junction Transistor
Define Emitter (e) properties. Ans✓✓✓n+ for NPN transistors and p+
for PNP transistors. Moderate size and heavily doped.
Define Base (b) properties. Ans✓✓✓p for NPN transistors and n for
PNP transistors. Thin and lightly doped.
Define Collector (c) properties. Ans✓✓✓n for NPN transistors and p for
PNP transistors. Larger than the emitter and the base and moderately
doped.
What is the effect of the base being thin? Ans✓✓✓1) Most of the
majority charge carriers exiting from the emitter will pass through the
base and reach the collector
2) The time for majority charge carriers to pass the base is the minimum.
Waht defines the mode of operation of BJTs? Ans✓✓✓The biasing
conditions of the pn junctions.
, Where do diffusion-induced pn-junctions exist in a BJT? Ans✓✓✓They
exist at the interfaces of both emitter/base and collector/base.
Which one is smaler, the width of the emitter/base pn junction or the
base/collector pn junction? Ans✓✓✓The emitter/base pn junction is
smaller.
What happens when the emitter/base pn-junction is NOT forward
biased? Ans✓✓✓Electrons (for NPN) or holes (for PNP) in the emitter
will be retained in the emitter. No flow of electrons or holes from the
emitter to the base/collector. No emitter current, base current, and
collector current.
When the emitter/base pn-junction is forward biased, what happens?
Ans✓✓✓Electrons (for NPN) or holes (for PNP) in the emitter will exit
from the emitter and move to the base/collector.
What is the emitter current formula? Ans✓✓✓i_E approximately equal
to (I_s)(e^v_BE/vt)
Transistor Ans✓✓✓A three terminal semiconductor device that
regulates current or voltage flow and acts as a switch or gate for signals.
What are the uses of a transistor? Ans✓✓✓Acts as an amplifier, where
signal strength has to be increased
(BJTS) QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW!!
What are the two types of BJTs? Ans✓✓✓NPN and PNP transistors.
What does BJT stand for? Ans✓✓✓Bipolar Junction Transistor
Define Emitter (e) properties. Ans✓✓✓n+ for NPN transistors and p+
for PNP transistors. Moderate size and heavily doped.
Define Base (b) properties. Ans✓✓✓p for NPN transistors and n for
PNP transistors. Thin and lightly doped.
Define Collector (c) properties. Ans✓✓✓n for NPN transistors and p for
PNP transistors. Larger than the emitter and the base and moderately
doped.
What is the effect of the base being thin? Ans✓✓✓1) Most of the
majority charge carriers exiting from the emitter will pass through the
base and reach the collector
2) The time for majority charge carriers to pass the base is the minimum.
Waht defines the mode of operation of BJTs? Ans✓✓✓The biasing
conditions of the pn junctions.
, Where do diffusion-induced pn-junctions exist in a BJT? Ans✓✓✓They
exist at the interfaces of both emitter/base and collector/base.
Which one is smaler, the width of the emitter/base pn junction or the
base/collector pn junction? Ans✓✓✓The emitter/base pn junction is
smaller.
What happens when the emitter/base pn-junction is NOT forward
biased? Ans✓✓✓Electrons (for NPN) or holes (for PNP) in the emitter
will be retained in the emitter. No flow of electrons or holes from the
emitter to the base/collector. No emitter current, base current, and
collector current.
When the emitter/base pn-junction is forward biased, what happens?
Ans✓✓✓Electrons (for NPN) or holes (for PNP) in the emitter will exit
from the emitter and move to the base/collector.
What is the emitter current formula? Ans✓✓✓i_E approximately equal
to (I_s)(e^v_BE/vt)
Transistor Ans✓✓✓A three terminal semiconductor device that
regulates current or voltage flow and acts as a switch or gate for signals.
What are the uses of a transistor? Ans✓✓✓Acts as an amplifier, where
signal strength has to be increased
