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mod 3 3.13 - 3.14 - 3.15
39問 • 11ヶ月前
  • Yousef Alshammary
    • 通報

    問題一覧

  • 1

    Number of cycle completed per second

    frequency

  • 2

    Alternating polarity from an alternator takes on a distinct shape, known as

    a sine wave

  • 3

    Root mean square:

    is the equivalent DC heating effect

  • 4

    The peak value of an aircraft 115v single phase is

    162.6

  • 5

    A sine wave of RMS value 7.06 volts has a peak to peak value of.

    20 Volts

  • 6

    Peak value

    RMS/0.707

  • 7

    The form factor of an AC waveform can be found by

    RMS value divided by the average value

  • 8

    Square-shaped waveforms always have crest and form factors equal to 1, since

    the peak is the same as the RMS and average values

  • 9

    Split phase means

    single phase

  • 10

    Line voltage with a delta type connection will be

    the same as phase voltage

  • 11

    The max. Value of voltage in either (+ve) or (– ve) direction is

    The peak value

  • 12

    The AC waveform has mark-to-space ratio 0.5 this means

    the space is twice the mark

  • 13

    constant direction

    direct current

  • 14

    The Form Factor of an AC waveform can be found by

    RMS value divided by the average value

  • 15

    If frequency is reduced in the AC circuit the

    inductive element will be damaged

  • 16

    The unit is Ohm for Inductive reactance(XL)

    capacitive reactance(XC) ,and impedance(Z)

  • 17

    In an AC circuit containing resistance and inductance

    current lags the voltage by up to 90 degrees

  • 18

    To calculate inductive reactance, you need

    inductance and frequency

  • 19

    circuit containing capacitor of capacitance C = 50µF and frequency f = 100Hz Xc

    31.8Ω

  • 20

    Reactive power for XC=12Ω XL=8 Ω I =2A= (IC)²XC – (IL)²XL=

    16 watt

  • 21

    R = 30 Ω XC = 40 Ω FIND IMPEDANCE √2500

    50 Ω

  • 22

    The power coefficient is defined as

    cosine of the phase shift angle between current and voltage

  • 23

    power consumed

    V²/R

  • 24

    In a capacitor the voltage always

    lags the current

  • 25

    Capacitor discharging: voltage decreasing, inductor charging, current will

    increasing

  • 26

    The power returned to the source by the reactive components of the circuit is

    reactive power

  • 27

    the device that transfers electrical energy from one circuit to another by electromagnetic induction is

    transformer

  • 28

    The purpose of the core in the transformer is

    provides a path for the magnetic lines of flux

  • 29

    The primary winding, which receives

    energy from the ac source.

  • 30

    The secondary winding, which receives energy from the primary winding and

    delivers it to the load

  • 31

    secondary voltage may be either in or out of phase with the primary voltage depends on the

    direction in which the windings are wound

  • 32

    To reduce eddy-current In a transformer you would

    reduce the thickness of laminations in the magnetic core

  • 33

    In a transformer the core provides

    a path for the magnetic lines

  • 34

    An autotransformer has

    1 coil

  • 35

    The current transformer are designed to be powering

    ammeteres

  • 36

    The total voltage induced into the secondary winding of a transformer is determined mainly by

    the ratio of the number of turns in the primary to the number of turns in the secondary

  • 37

    Radio-Frequency Transformers used to couple circuits to which frequencies

    above 20,000 Hz

  • 38

    If the input power to a transformer is 650 watts and the output power is 610 watts, what is the efficiency?

    94%

  • 39

    If a transformer of 5:1 with Vin=120V supplies a light of 24V/45A how much is the input current

    I=9A

    • mod 3 3.1 - 3.2 - 3.3

    mod 3 3.1 - 3.2 - 3.3

    Yousef Alshammary · 24問 · 12ヶ月前

    mod 3 3.1 - 3.2 - 3.3

    mod 3 3.1 - 3.2 - 3.3

    24問 • 12ヶ月前
    Yousef Alshammary

    mod 3 3.4 - 3.5 - 3.6

    mod 3 3.4 - 3.5 - 3.6

    Yousef Alshammary · 39問 · 12ヶ月前

    mod 3 3.4 - 3.5 - 3.6

    mod 3 3.4 - 3.5 - 3.6

    39問 • 12ヶ月前
    Yousef Alshammary

    mod 3 3.7 - 3.8 - 3.9

    mod 3 3.7 - 3.8 - 3.9

    Yousef Alshammary · 38問 · 11ヶ月前

    mod 3 3.7 - 3.8 - 3.9

    mod 3 3.7 - 3.8 - 3.9

    38問 • 11ヶ月前
    Yousef Alshammary

    mod 3 3.10 - 3.11 - 3.12

    mod 3 3.10 - 3.11 - 3.12

    Yousef Alshammary · 41問 · 11ヶ月前

    mod 3 3.10 - 3.11 - 3.12

    mod 3 3.10 - 3.11 - 3.12

    41問 • 11ヶ月前
    Yousef Alshammary

    mod 3 3.16 - 3.17 - 3.18

    mod 3 3.16 - 3.17 - 3.18

    Yousef Alshammary · 27問 · 11ヶ月前

    mod 3 3.16 - 3.17 - 3.18

    mod 3 3.16 - 3.17 - 3.18

    27問 • 11ヶ月前
    Yousef Alshammary

    mod 5 5.1 - EFIS - DAC - A429 - A629 - AND - NAND

    mod 5 5.1 - EFIS - DAC - A429 - A629 - AND - NAND

    Yousef Alshammary · 34問 · 11ヶ月前

    mod 5 5.1 - EFIS - DAC - A429 - A629 - AND - NAND

    mod 5 5.1 - EFIS - DAC - A429 - A629 - AND - NAND

    34問 • 11ヶ月前
    Yousef Alshammary

    mod 5 OR - Buses - Buf Reg - 5.10 - RL - Basic

    mod 5 OR - Buses - Buf Reg - 5.10 - RL - Basic

    Yousef Alshammary · 29問 · 11ヶ月前

    mod 5 OR - Buses - Buf Reg - 5.10 - RL - Basic

    mod 5 OR - Buses - Buf Reg - 5.10 - RL - Basic

    29問 • 11ヶ月前
    Yousef Alshammary

    mod 5 Single - multimund - optical - 5.11 - LCD - 5.12 - PCB - 5.13

    mod 5 Single - multimund - optical - 5.11 - LCD - 5.12 - PCB - 5.13

    Yousef Alshammary · 38問 · 11ヶ月前

    mod 5 Single - multimund - optical - 5.11 - LCD - 5.12 - PCB - 5.13

    mod 5 Single - multimund - optical - 5.11 - LCD - 5.12 - PCB - 5.13

    38問 • 11ヶ月前
    Yousef Alshammary

    mod 5 Safety - software - 5.14 - HIRF - HIRF EMI

    mod 5 Safety - software - 5.14 - HIRF - HIRF EMI

    Yousef Alshammary · 26問 · 11ヶ月前

    mod 5 Safety - software - 5.14 - HIRF - HIRF EMI

    mod 5 Safety - software - 5.14 - HIRF - HIRF EMI

    26問 • 11ヶ月前
    Yousef Alshammary

    mod 5 5.15

    mod 5 5.15

    Yousef Alshammary · 25問 · 11ヶ月前

    mod 5 5.15

    mod 5 5.15

    25問 • 11ヶ月前
    Yousef Alshammary

    mod 5 Numbering System

    mod 5 Numbering System

    Yousef Alshammary · 16問 · 11ヶ月前

    mod 5 Numbering System

    mod 5 Numbering System

    16問 • 11ヶ月前
    Yousef Alshammary

    7.1

    7.1

    Yousef Alshammary · 18問 · 11ヶ月前

    7.1

    7.1

    18問 • 11ヶ月前
    Yousef Alshammary

    7.2

    7.2

    Yousef Alshammary · 11問 · 11ヶ月前

    7.2

    7.2

    11問 • 11ヶ月前
    Yousef Alshammary

    7.3 - 7.4

    7.3 - 7.4

    Yousef Alshammary · 32問 · 11ヶ月前

    7.3 - 7.4

    7.3 - 7.4

    32問 • 11ヶ月前
    Yousef Alshammary

    7.5

    7.5

    Yousef Alshammary · 9問 · 11ヶ月前

    7.5

    7.5

    9問 • 11ヶ月前
    Yousef Alshammary

    7.6 - 7.8

    7.6 - 7.8

    Yousef Alshammary · 8問 · 11ヶ月前

    7.6 - 7.8

    7.6 - 7.8

    8問 • 11ヶ月前
    Yousef Alshammary

    7.9

    7.9

    Yousef Alshammary · 10問 · 11ヶ月前

    7.9

    7.9

    10問 • 11ヶ月前
    Yousef Alshammary

    7.10

    7.10

    Yousef Alshammary · 12問 · 11ヶ月前

    7.10

    7.10

    12問 • 11ヶ月前
    Yousef Alshammary

    7.11

    7.11

    Yousef Alshammary · 7問 · 11ヶ月前

    7.11

    7.11

    7問 • 11ヶ月前
    Yousef Alshammary

    6.3

    6.3

    Yousef Alshammary · 46問 · 11ヶ月前

    6.3

    6.3

    46問 • 11ヶ月前
    Yousef Alshammary

    問題一覧

  • 1

    Number of cycle completed per second

    frequency

  • 2

    Alternating polarity from an alternator takes on a distinct shape, known as

    a sine wave

  • 3

    Root mean square:

    is the equivalent DC heating effect

  • 4

    The peak value of an aircraft 115v single phase is

    162.6

  • 5

    A sine wave of RMS value 7.06 volts has a peak to peak value of.

    20 Volts

  • 6

    Peak value

    RMS/0.707

  • 7

    The form factor of an AC waveform can be found by

    RMS value divided by the average value

  • 8

    Square-shaped waveforms always have crest and form factors equal to 1, since

    the peak is the same as the RMS and average values

  • 9

    Split phase means

    single phase

  • 10

    Line voltage with a delta type connection will be

    the same as phase voltage

  • 11

    The max. Value of voltage in either (+ve) or (– ve) direction is

    The peak value

  • 12

    The AC waveform has mark-to-space ratio 0.5 this means

    the space is twice the mark

  • 13

    constant direction

    direct current

  • 14

    The Form Factor of an AC waveform can be found by

    RMS value divided by the average value

  • 15

    If frequency is reduced in the AC circuit the

    inductive element will be damaged

  • 16

    The unit is Ohm for Inductive reactance(XL)

    capacitive reactance(XC) ,and impedance(Z)

  • 17

    In an AC circuit containing resistance and inductance

    current lags the voltage by up to 90 degrees

  • 18

    To calculate inductive reactance, you need

    inductance and frequency

  • 19

    circuit containing capacitor of capacitance C = 50µF and frequency f = 100Hz Xc

    31.8Ω

  • 20

    Reactive power for XC=12Ω XL=8 Ω I =2A= (IC)²XC – (IL)²XL=

    16 watt

  • 21

    R = 30 Ω XC = 40 Ω FIND IMPEDANCE √2500

    50 Ω

  • 22

    The power coefficient is defined as

    cosine of the phase shift angle between current and voltage

  • 23

    power consumed

    V²/R

  • 24

    In a capacitor the voltage always

    lags the current

  • 25

    Capacitor discharging: voltage decreasing, inductor charging, current will

    increasing

  • 26

    The power returned to the source by the reactive components of the circuit is

    reactive power

  • 27

    the device that transfers electrical energy from one circuit to another by electromagnetic induction is

    transformer

  • 28

    The purpose of the core in the transformer is

    provides a path for the magnetic lines of flux

  • 29

    The primary winding, which receives

    energy from the ac source.

  • 30

    The secondary winding, which receives energy from the primary winding and

    delivers it to the load

  • 31

    secondary voltage may be either in or out of phase with the primary voltage depends on the

    direction in which the windings are wound

  • 32

    To reduce eddy-current In a transformer you would

    reduce the thickness of laminations in the magnetic core

  • 33

    In a transformer the core provides

    a path for the magnetic lines

  • 34

    An autotransformer has

    1 coil

  • 35

    The current transformer are designed to be powering

    ammeteres

  • 36

    The total voltage induced into the secondary winding of a transformer is determined mainly by

    the ratio of the number of turns in the primary to the number of turns in the secondary

  • 37

    Radio-Frequency Transformers used to couple circuits to which frequencies

    above 20,000 Hz

  • 38

    If the input power to a transformer is 650 watts and the output power is 610 watts, what is the efficiency?

    94%

  • 39

    If a transformer of 5:1 with Vin=120V supplies a light of 24V/45A how much is the input current

    I=9A