Test
Test 2 study for final
Crea una cuenta gratis para terminar este test
Guarda tu progreso y consulta tu resultado final.
¿Ya tienes cuenta? Inicia sesión
Preguntas del test (25)
1Which of these is the best description of a zener diode?
- AIt is a rectifier diode.
- BIt is a constant-voltage device.
- CIt is a constant-current device.
- DIt works in the forward region.
2A transistor has how many pn junctions?
- A1
- B2
- C3
- D4
3The current gain of a transistor is defined as the ratio of the collector current to the
- ABase current
- BEmitter current
- CSupply current
- DCollector current
4A zener diode
- AIs a battery
- BHas a constant voltage in the breakdown region
- CHas a barrier potential of 1 V
- DIs forward biased
5The barrier potential across each silicon deletion layer is
- A0
- B0.3 V
- C0.7 V
- D1 V
6When the base resistor increases, the collector voltage will probably
- ADecrease
- BStay the same
- CIncrease
- DDo all of the above
7If the zener diode in a zener regulator is connected with the wrong polarity, the load voltage will be closest to
- A0.7 V
- B10 V
- C14 V
- D18 V
8The emitter diode is usually
- AForward biased
- BReverse biased
- CNonconducting
- DOperating in the breakdown region
9If the base resistor is very small, the transistor will operate in the
- ACutoff region
- BActive region
- CSaturation region
- DBreakdown region
10At high frequencies, ordinary diodes don't work properly because of
- AForward bias
- BReverse bias
- CBreakdown
- DCharge storage
11For normal operation of the transistor, the collector diode has to be
- AForward biased
- BReversed biased
- CNonconducting
- DOperating in the breakdown region
12Ignoring the bulk resistance of the collector diode, the collector-emitter saturation voltage is
- A0
- BA few tenths of a volt
- C1 V
- DSupply voltage
13Breakdown does not destroy a zener diode, provided the zener current is less than the
- ABreakdown voltage
- BZener test current
- CMaximum zener current rating
- DBarrier potential
14Most 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
15If the base supply voltage is disconnected, the collector-emitter voltage will equal
- A0 V
- B6 V
- C10.5 V
- DCollector supply voltage
16A photodiode is normally
- AForward biased
- BReverse biased
- CNeither forward nor reverse biased
- DEmitting light
17The 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
18The base current is 50 μA. If the current gain is 100, the collector current is closest in value to
- A50 μA
- B500 μA
- C2 mA
- D5 mA
19The device associated with voltage controlled capacitance is a
- ALight-emitting diode
- BPhotodiode
- CVaractor diode
- DZener diode
20The beta of a transistor is the ratio of the
- ACollector current to the emitter current
- BCollector current to base current
- CBase current to collector current
- DEmitter current to collector current
21A circuit with a fixed emitter current is called
- ABase bias
- BEmitter bias
- CTransistor bias
- DTwo-supply bias
22To isolate an output circuit from an input circuit, which is the device to use?
- ABack diode
- BOptocoupler
- CSeven-segment indicator
- DTunnel diode
23The 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
24When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current
- ARemains almost the same
- BDecreases by a factor of 6
- CIncreases by a factor of 6
- DIs zero
25If the base resistor is open, what is the collector current?
- A0
- B1 mA
- C2 mA
- D10 mA
Información
- Descripción
- Nuclear Program Test sobre Test 2 study for final, creado por Katrina Himes el 04/06/2018.
- Autor
- Katrina Himes
- Idioma
- English
- Visitas
- 49
- Etiquetas
- Valoración
- 5,0 de 5 · 1 valoración Valora este test