Test
Chapter 6 Study
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Preguntas del test (30)
1A transistor has how many pn junctions?
- A1
- B2
- C3
- D4
2What is one important thing transistors do?
- AAmplify weak signals
- BRectify line voltage
- CStep-down voltage
- DEmit light
3Who invented the first junction transistor?
- ABell
- BFaraday
- CMarconi
- DSchockley
4In an npn transistor, the majority carriers in the emitter are
- AFree electrons
- BHoles
- CNeither
- DBoth
5The barrier potential across each silicon depletion layer is
- A0
- B0.3 V
- C0.7 V
- D1 V
6The emitter diode is usually
- AForward biased
- BReverse biased
- CNonconducting
- DOperating in the breakdown region
7For normal operation of the transistor, the collector diode has to be
- AForward biased
- BReverse biased
- CNonconducting
- DOperating in the breakdown region
8The base of an npn transistor is thin and
- AHeavily doped
- BLightly doped
- CMetallic
- DDoped by a pentavalent material
9Most of the electrons in the base of an npn transistor flow
- AOut of the base lead
- BInto the collector
- CInto the emitter
- DInto the base supply
10Most of the electrons in the base of an npn transistor do not recombine because they
- AHave a long lifetime
- BHave a negative charge
- CMust flow through the base
- DFlow out of the base
11Most of the electrons that flow through the base will
- AFlow into the collector
- BFlow out of the base lead
- CRecombine with base holes
- DRecombine with collector holes
12The beta of a transistor is the ratio of the
- ACollector current to emitter current
- BCollector current to base current
- CBase current to collector current
- DEmitter current to collector current
13Increasing the collector supply voltage will increase
- ABase current
- BCollector current
- CEmitter current
- DNone of the above
14The fact that there are many free electrons in a transistor emitter region means the emitter is
- ALightly doped
- BHeavily doped
- CUndoped
- DNone of the above
15In a normally biased npn transistor, the electrons in the emitter have enough energy to overcome the barrier potential of the
- ABase-emitter junction
- BBase-collector junction
- CCollector-base junction
- DRecombination path
16In a pnp transistor, the major carriers in the emitter are
- AFree electrons
- BHoles
- CNeither
- DBoth
17What is the most important fact about the collector current?
- AIt is measured in milliamperes.
- BIt equals the base current divided by the current gain.
- CIt is small.
- DIt approximately equals the emitter current.
18If the current gain is 100 and the collector current is 10 mA, the base current is
- A10 µA
- B100 µA
- C1 A
- D10 A
19The base-emitter voltage is usually
- ALess than the base supply voltage
- BEqual to the base supply voltage
- CMore than the base supply voltage
- DCannot answer
20The collector-emitter voltage is usually
- ALess than the collector supply voltage
- BEqual to the collector supply voltage
- CMore than the collector supply voltage
- DCannot answer
21The power dissipated by a transistor approximately equals the collector current times
- ABase-emitter voltage
- BCollector-emitter voltage
- CBase supply voltage
- D0.7 V
22A small collector current with zero base current is caused by the leakage current of the
- AEmitter diode
- BCollector diode
- CBase diode
- DTransistor
23A transistor acts like a diode and a
- AVoltage source
- BCurrent source
- CResistance
- DPower supply
24If the base current is 100 mA and the current gain is 30, the emitter current is
- A3.33 mA
- B3 A
- C3.1 A
- D10 A
25The base-emitter voltage of an ideal transistor is
- A0
- B0.3 V
- C0.7 V
- D1 V
26If you recalculate the collector-emitter voltage with the second approximation, the answer will usually be
- ASmaller than the ideal value
- BThe same as the ideal value
- CLarger than the ideal value
- DInaccurate
27In the active region, the collector current is not changed significantly by
- ABase supply voltage
- BBase current
- CCurrent gain
- DCollector resistance
28The base-emitter voltage of the second approximation is
- A0
- B0.3 V
- C0.7 V
- D1 V
29If the base resistor is open, what is the collector current?
- A0
- B1 mA
- C2 mA
- D10 mA
30When comparing the power dissipation of a 2N3904 transistor to the PZT3904 surface-mount version, the 2N3904
- ACan handle less power
- BCan handle more power
- CCan handle the same power
- DIs not rated
Información
- Descripción
- Nuclear Program Test sobre Chapter 6 Study, creado por Katrina Himes el 08/05/2018.
- Autor
- Katrina Himes
- Idioma
- English
- Visitas
- 7
- Etiquetas
- Valoración
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