14140499
Descripción
Test por Katrina Himes, actualizado hace más de 1 año
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Creado por Katrina Himes
hace alrededor de 6 años
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Pregunta 1
Pregunta
For the emitter bias, the voltage across the emitter resistor is the same as the voltage between the emitter and the
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Base
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Collector
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Emitter
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Ground
Pregunta 2
Pregunta
A coupling capacitor is
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A dc short
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An ac open
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A dc open and an ac short
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A dc short and an ac open
Pregunta 3
Pregunta
The emitter is at ac ground in a
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CB stage
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CC stage
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CE stage
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None of these
Pregunta 4
Pregunta
For emitter bias, the voltage at the emitter is 0.7 V less than the
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Base voltage
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Emitter voltage
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Collector voltage
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Ground voltage
Pregunta 5
Pregunta
The capacitor that produces an ac ground is called a
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Bypass capacitor
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Coupling capacitor
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DC open
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AC open
Pregunta 6
Pregunta
The voltage gain equals the output voltage divided by the
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Input voltage
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AC emitter resistance
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AC collector resistance
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Generator voltage
Pregunta 7
Pregunta
VDB is noted for its
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Unstable collector voltage
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Varying emitter current
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Large base current
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Stable Q point
Pregunta 8
Pregunta
The capacitors of a CE amplifier appear to be
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Open to ac
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Shorted to dc
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Open to supply voltage
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Shorted to ac
Pregunta 9
Pregunta
A swamped amplifier uses
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Base bias
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Positive feedback
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Negative feedback
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A grounded emitter
Pregunta 10
Pregunta
VDB needs
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Only three resistors
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Only one supply
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Precision resistors
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More resistors to work better
Pregunta 11
Pregunta
The ac equivalent circuit is derived from the original circuit by shorting all
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Resistors
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Capacitors
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Inductors
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Transistors
Pregunta 12
Pregunta
In a swamped amplifier, the effects of the emitter diode become
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Important to voltage gain
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Critical to input impedance
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Significant to the analysis
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Unimportant
Pregunta 13
Pregunta
VDB normally operates in the
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Active region
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Cutoff region
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Saturation region
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Breakdown region
Pregunta 14
Pregunta
AC emitter resistance equals 25 mV divided by the
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Quiescent base current
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DC emitter current
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AC emitter current
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Change in collector current
Pregunta 15
Pregunta
The feedback resistor
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Increases voltage gain
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Reduces distortion
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Decreases collector resistance
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Decreases input impedance
Pregunta 16
Pregunta
If the emitter resistance is reduced by one-half in a VDB circuit, the collector current will
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Double
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Drop in half
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Remain the same
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Increase
Pregunta 17
Pregunta
The output voltage of a CE amplifier is
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Amplified
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Inverted
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180 ° out of phase with the input
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All of the above
Pregunta 18
Pregunta
The ac collector resistance of the first stage includes the
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Load resistance
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Input impedance of first stage
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Emitter resistance of first stage
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Input impedance of second stage
Pregunta 19
Pregunta
The base voltage of two-supply emitter bias (TSEB) is
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0.7 V
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Very large
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Near 0 V
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1.3 V
Pregunta 20
Pregunta
The emitter of a CE amplifier has no ac voltage because of the
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DC voltage on it
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Bypass capacitor
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Coupling capacitor
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Load resistor
Pregunta 21
Pregunta
If the input-coupling capacitor is open, the ac input voltage will
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Decrease
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Increase
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Remain the same
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Equal zero
Pregunta 22
Pregunta
The Q point of TSEB does not depend on the
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Emitter resistance
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Collector resistance
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Current gain
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Emitter voltage
Pregunta 23
Pregunta
The voltage across the load resistor of a capacitor-coupled CE amplifier is
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DC and AC
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DC only
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AC only
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Neither DC or AC
Pregunta 24
Pregunta
The ac collector current equals the ac base current times the
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AC collector resistance
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DC current gain
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AC current gain
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Generator voltage
Pregunta 25
Pregunta
For dc, the current in a coupling circuit is
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Zero
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Maximum
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Minimum
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Average
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