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Quiz2

Authored by Priyalakshmi B

English

University

Quiz2
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary assumption in small-signal analysis of BJTs?

The transistor operates in the cutoff region
The transistor operates in the saturation region
The transistor operates in the active region
The transistor operates in the breakdown region

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In small-signal modeling, what parameter represents the small-signal current gain of a BJT?

ror_o
gmg_m
β\beta
VBEV_{BE}

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the small-signal transconductance (gmg_m) of a BJT defined as?

gm=IC/VBEg_m = I_C/V_{BE}
gm=IE/VBEg_m = I_E/V_{BE}
gm=IC/VCEg_m = I_C/V_{CE}
gm=IC/VTg_m = I_C/V_T

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the hybrid-pi model, what component represents the small-signal base-emitter resistance?

ror_o
rπr_\pi
gmg_m
β\beta

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The small-signal output resistance (ror_o) in the hybrid-pi model is given by:

ro=VA/ICr_o = V_A / I_C
ro=VC/ICr_o = V_C / I_C
ro=β/gmr_o = \beta/g_m
ro=1/gmr_o = 1/g_m

6.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which of the following factors affect the small-signal voltage gain of a common-emitter amplifier?

Load resistance
Transconductance (gmg_m)
Intrinsic emitter resistance (rer_e)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The input impedance of a common-emitter amplifier without emitter degeneration is approximately:

ror_o
rπr_\pi
1/gm1/g_m
βro\beta r_o

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