WorksheetsQuiz2
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What is the primary assumption in small-signal analysis of BJTs?
a)
The transistor operates in the cutoff region
b)
The transistor operates in the saturation region
c)
The transistor operates in the active region
d)
The transistor operates in the breakdown region
2.
In small-signal modeling, what parameter represents the small-signal current gain of a BJT?
a)
ror_o
b)
gmg_m
c)
β\beta
d)
VBEV_{BE}
3.
What is the small-signal transconductance (gmg_m) of a BJT defined as?
a)
gm=IC/VBEg_m = I_C/V_{BE}
b)
gm=IE/VBEg_m = I_E/V_{BE}
c)
gm=IC/VCEg_m = I_C/V_{CE}
d)
gm=IC/VTg_m = I_C/V_T
4.
In the hybrid-pi model, what component represents the small-signal base-emitter resistance?
a)
ror_o
b)
rπr_\pi
c)
gmg_m
d)
β\beta
5.
The small-signal output resistance (ror_o) in the hybrid-pi model is given by:
a)
ro=VA/ICr_o = V_A / I_C
b)
ro=VC/ICr_o = V_C / I_C
c)
ro=β/gmr_o = \beta/g_m
d)
ro=1/gmr_o = 1/g_m
6.
Which of the following factors affect the small-signal voltage gain of a common-emitter amplifier?
a)
Load resistance
b)
Transconductance (gmg_m)
c)
Intrinsic emitter resistance (rer_e)
7.
The input impedance of a common-emitter amplifier without emitter degeneration is approximately:
a)
ror_o
b)
rπr_\pi
c)
1/gm1/g_m
d)
βro\beta r_o
8.
The voltage gain of a common-emitter amplifier with a resistive load can be approximated as:
a)
gmRCg_m R_C
b)
RC/rπR_C / r_\pi
c)
βRC\beta R_C
d)
1/gmRC1/g_m R_C
9.
How does adding an emitter resistor (RER_E) affect the voltage gain in a common-emitter amplifier?
a)
Increases the gain
b)
Decreases the gain
c)
Has no effect on gain
d)
Makes the gain infinite
10.
In small-signal analysis, which model is most commonly used for high-frequency BJT analysis?
a)
Hybrid-pi model
b)
T-model
c)
Large-signal Ebers-Moll model
d)
Small-signal Thévenin model
100 %
