Test 2 study for final

Descripción

Nuclear Program Test sobre Test 2 study for final, creado por Katrina Himes el 04/06/2018.
Katrina Himes
Test por Katrina Himes, actualizado hace más de 1 año
Katrina Himes
Creado por Katrina Himes hace más de 6 años
44
1

Resumen del Recurso

Pregunta 1

Pregunta
Which of these is the best description of a zener diode?
Respuesta
  • It is a rectifier diode.
  • It is a constant-voltage device.
  • It is a constant-current device.
  • It works in the forward region.

Pregunta 2

Pregunta
A transistor has how many pn junctions?
Respuesta
  • 1
  • 2
  • 3
  • 4

Pregunta 3

Pregunta
The current gain of a transistor is defined as the ratio of the collector current to the
Respuesta
  • Base current
  • Emitter current
  • Supply current
  • Collector current

Pregunta 4

Pregunta
A zener diode
Respuesta
  • Is a battery
  • Has a constant voltage in the breakdown region
  • Has a barrier potential of 1 V
  • Is forward biased

Pregunta 5

Pregunta
The barrier potential across each silicon deletion layer is
Respuesta
  • 0
  • 0.3 V
  • 0.7 V
  • 1 V

Pregunta 6

Pregunta
When the base resistor increases, the collector voltage will probably
Respuesta
  • Decrease
  • Stay the same
  • Increase
  • Do all of the above

Pregunta 7

Pregunta
If the zener diode in a zener regulator is connected with the wrong polarity, the load voltage will be closest to
Respuesta
  • 0.7 V
  • 10 V
  • 14 V
  • 18 V

Pregunta 8

Pregunta
The emitter diode is usually
Respuesta
  • Forward biased
  • Reverse biased
  • Nonconducting
  • Operating in the breakdown region

Pregunta 9

Pregunta
If the base resistor is very small, the transistor will operate in the
Respuesta
  • Cutoff region
  • Active region
  • Saturation region
  • Breakdown region

Pregunta 10

Pregunta
At high frequencies, ordinary diodes don't work properly because of
Respuesta
  • Forward bias
  • Reverse bias
  • Breakdown
  • Charge storage

Pregunta 11

Pregunta
For normal operation of the transistor, the collector diode has to be
Respuesta
  • Forward biased
  • Reversed biased
  • Nonconducting
  • Operating in the breakdown region

Pregunta 12

Pregunta
Ignoring the bulk resistance of the collector diode, the collector-emitter saturation voltage is
Respuesta
  • 0
  • A few tenths of a volt
  • 1 V
  • Supply voltage

Pregunta 13

Pregunta
Breakdown does not destroy a zener diode, provided the zener current is less than the
Respuesta
  • Breakdown voltage
  • Zener test current
  • Maximum zener current rating
  • Barrier potential

Pregunta 14

Pregunta
Most of the electrons in the base of an npn transistor flow
Respuesta
  • Out of the base lead
  • Into the collector
  • Into the emitter
  • Into the base supply

Pregunta 15

Pregunta
If the base supply voltage is disconnected, the collector-emitter voltage will equal
Respuesta
  • 0 V
  • 6 V
  • 10.5 V
  • Collector supply voltage

Pregunta 16

Pregunta
A photodiode is normally
Respuesta
  • Forward biased
  • Reverse biased
  • Neither forward nor reverse biased
  • Emitting light

Pregunta 17

Pregunta
The base-emitter voltage is usually
Respuesta
  • Less than the base supply voltage
  • Equal to the base supply voltage
  • More than the base supply voltage
  • Cannot answer

Pregunta 18

Pregunta
The base current is 50 μA. If the current gain is 100, the collector current is closest in value to
Respuesta
  • 50 μA
  • 500 μA
  • 2 mA
  • 5 mA

Pregunta 19

Pregunta
The device associated with voltage controlled capacitance is a
Respuesta
  • Light-emitting diode
  • Photodiode
  • Varactor diode
  • Zener diode

Pregunta 20

Pregunta
The beta of a transistor is the ratio of the
Respuesta
  • Collector current to the emitter current
  • Collector current to base current
  • Base current to collector current
  • Emitter current to collector current

Pregunta 21

Pregunta
A circuit with a fixed emitter current is called
Respuesta
  • Base bias
  • Emitter bias
  • Transistor bias
  • Two-supply bias

Pregunta 22

Pregunta
To isolate an output circuit from an input circuit, which is the device to use?
Respuesta
  • Back diode
  • Optocoupler
  • Seven-segment indicator
  • Tunnel diode

Pregunta 23

Pregunta
The collector-emitter voltage is usually
Respuesta
  • Less than the collector supply voltage
  • Equal to the collector supply voltage
  • More than the collector supply voltage
  • Cannot answer

Pregunta 24

Pregunta
When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current
Respuesta
  • Remains almost the same
  • Decreases by a factor of 6
  • Increases by a factor of 6
  • Is zero

Pregunta 25

Pregunta
If the base resistor is open, what is the collector current?
Respuesta
  • 0
  • 1 mA
  • 2 mA
  • 10 mA
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