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  • Maxwell Nemir

  • 問題数 24 • 8/8/2024

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    問題一覧

  • 1

    The distance a wave penetrates into a conductor before being completely absorbed is called

    Skin depth

  • 2

    The gate voltage that must be applied to a field effect transistor for it to conduct current is called the

    Threshold voltage

  • 3

    The main problem with the half-wave rectifier is

    - It only uses the positive half cycle of the AC line voltage

  • 4

    The two types of transistors are the bipolar and the

    field effect

  • 5

    The four key components of a wireless transmitter are oscillator, amplifier, antenna and

    - Modulator

  • 6

    The frequency of an electromagnetic wave is expressed in units called

    - Hertz

  • 7

    The piece of equipment that minimizes the “peaks and valleys” seen in the rectifiers output is the

    - Transformer

  • 8

    Another way to smooth the DC output voltage of the rectifier is to add a

    Half-wave buffer

  • 9

    The most widely used semiconductor material used in solid state electronic device is

    Silicon

  • 10

    Solid state devices can fail due to

    - Manufacturing defects

  • 11

    The advantages of transistors over vacuum tubes include size, cost, efficiency, reliability and

    - ease of manufacturing

  • 12

    There are three key functions of logic circuits, these are to make decisions, preform math and

    store information

  • 13

    The component of a DC power supply that convert AC to DC is the:

    rectifier

  • 14

    A passive device that consists of two conductors separated by an insulator is a

    Capacitor

  • 15

    What is the approximate built-in voltage,in mV, in silicone diodes

    - 700

  • 16

    The drawback of a center-tap rectifier is that it requires a

    center-tap transformer

  • 17

    The “dead zone” at the top of an antenna where the antenna does not transmit EM waves is called

    - Null

  • 18

    The conductivity of a semiconductor can be easily modified through a process called

    - Doping

  • 19

    In a receiver, the information signal is separated from the carrier frequency by the

    Detector

  • 20

    The binary number system is referred to as a base -__ number system

    - 2

  • 21

    The four key components of a DC power supply are transformer, rectifier, filter and

    Tap changer

  • 22

    A diode only allows current to flow in one direction which makes them useful in

    - determining break down voltages of electronic equipment?

  • 23

    The full wave length rectifier requires a total of _ diodes.

    - 4

  • 24

    A diode will no longer block current and will start to conduct current when its breakdown voltage is exceeded by the

    - reverse bias voltage