A
B
Av = IC × RC
C
D

# Q2: Which of the following conditions are needed to properly bias an npn transistor amplifier?

A
Forward bias the base/emitter junction and reverse bias the base/collector junction.
B
Forward bias the collector/base junction and reverse bias the emitter/base junction.
C
Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
D
Apply a large voltage on the base.

# Q3: Often a common-collector will be the last stage before the load; the main function of this stage is to

A
provide voltage gain
B
buffer the voltage amplifiers from the low-resistance load
C
provide phase inversion
D
provide a high-frequency path to improve the frequency response

# Q4: A JFET

A
is a current-controlled device
B
has a low input resistance
C
is a voltage-controlled device
D
is always forward-biased

# Q5: Often a common-collector will be the last stage before the load; the main function of this stage is to

A
provide voltage gain
B
buffer the voltage amplifiers from the low-resistance load
C
provide phase inversion
D
provide a high-frequency path to improve the frequency response

A
< 1
B
C
stabilized
D
nonlinear

A
AV = gmRd
B
AV = gmRS
C
D

A
B
re 25 mV × IC
C
D

A
< 1
B
C
stabilized
D
nonlinear

# Q10: The primary function of the bias circuit is to

A
hold the circuit stable at VCC
B
hold the circuit stable at vin
C
ensure proper gain is achieved
D
hold the circuit stable at the designed Q-point

# Q11: To get a negative gate-source voltage in a self-biased JFET circuit, you must use a

A
voltage divider
B
source resistor
C
ground
D
negative gate supply voltage

# Q12: Three different points are shown on a dc load line. The upper point represents the

A
minimum current gain
B
quiescent point
C
saturation point
D
cutoff point

# Q13: In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid

A
crossover distortion
B
unusually high efficiency
C
negative feedback
D
a low input impedance

# Q14: The capacitor that produces an ac ground is called a(n)

A
coupling capacitor
B
dc open
C
bypass capacitor
D
ac open

# Q15: The depletion-mode MOSFET

A
can operate with only positive gate voltages
B
can operate with only negative gate voltages
C
cannot operate in the ohmic region
D
can operate with positive as well as negative gate voltages

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