[ELECTRONIC PRINCIPLES (9TH EDITION)] EXAM with
Questions and Answers/Plus a Rationale Updated 2026
A+/Instant Download PDF
Table of Contents
Semiconductor Fundamentals and P-N Junctions
Diode Circuits and Rectification
Bipolar Junction Transistors (BJT) Characteristics
BJT Biasing and Amplifier Configurations
Field-Effect Transistors (FET) and MOSFETs
Operational Amplifier Basics and Applications
A silicon diode at room temperature (25°C) is subjected to a forward bias voltage that increases from
0.6V to 0.7V. Given the diode’s thermal voltage V
T
≈26mV, evaluate the approximate change in diode current (I
D
).
A. Current remains constant due to the depletion layer width.
,B. Current increases by a factor of approximately e
(0.1/0.026)
≈45.
C. Current decreases because the barrier potential is overcome.
D. Current increases linearly by exactly 100mA.
Answer: B
CORRECT ANSWER : B
Rationale: The diode current follows the Shockley equation I
D
=I
S
(e
V
D
/V
T
−1). Increasing the voltage by ΔV=0.1V results in a factor increase of e
ΔV/V
T
. Option A is incorrect as current increases exponentially, C is incorrect as the barrier is being overcome,
and D is incorrect because the relationship is exponential, not linear.
, A common-emitter amplifier utilizes a swamping resistor (emitter degeneration). How does this affect
the voltage gain (A
v
) and input impedance (Z
in
)?
A. A
v
increases, Z
in
decreases.
B. A
v
remains constant, Z
in
increases.
C. A
v
decreases, Z
in
increases.
Questions and Answers/Plus a Rationale Updated 2026
A+/Instant Download PDF
Table of Contents
Semiconductor Fundamentals and P-N Junctions
Diode Circuits and Rectification
Bipolar Junction Transistors (BJT) Characteristics
BJT Biasing and Amplifier Configurations
Field-Effect Transistors (FET) and MOSFETs
Operational Amplifier Basics and Applications
A silicon diode at room temperature (25°C) is subjected to a forward bias voltage that increases from
0.6V to 0.7V. Given the diode’s thermal voltage V
T
≈26mV, evaluate the approximate change in diode current (I
D
).
A. Current remains constant due to the depletion layer width.
,B. Current increases by a factor of approximately e
(0.1/0.026)
≈45.
C. Current decreases because the barrier potential is overcome.
D. Current increases linearly by exactly 100mA.
Answer: B
CORRECT ANSWER : B
Rationale: The diode current follows the Shockley equation I
D
=I
S
(e
V
D
/V
T
−1). Increasing the voltage by ΔV=0.1V results in a factor increase of e
ΔV/V
T
. Option A is incorrect as current increases exponentially, C is incorrect as the barrier is being overcome,
and D is incorrect because the relationship is exponential, not linear.
, A common-emitter amplifier utilizes a swamping resistor (emitter degeneration). How does this affect
the voltage gain (A
v
) and input impedance (Z
in
)?
A. A
v
increases, Z
in
decreases.
B. A
v
remains constant, Z
in
increases.
C. A
v
decreases, Z
in
increases.
