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3.14

3.14
13問 • 1年前
  • Guevara Official
    • 通報

    問題一覧

  • 1

    If frequency is reduced in the AC circuit the:

    inductive element will be damaged

  • 2

    The unit is Ohm for

    Inductive reactance(XL) ,capacitive reactance(XC) ,and impedance(Z)

  • 3

    In an AC circuit containing resistance and inductance :

    current lags the voltage by up to 90 degrees

  • 4

    To calculate inductive reactance, you need :

    inductance and frequency

  • 5

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

    31.8Ω

  • 6

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

    16 watt

  • 7

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

    50 Ω

  • 8

    Ideal coil XL=100 ohms and V=200V find power consumed V=IR then I= 200/XL

    200/100 =2A P= I²(XL) p=4*100 =400 VA

  • 9

    The power coefficient is defined as: -

    cosine of the phase shift angle between current and voltage.

  • 10

    power consumed

    =V²/R

  • 11

    In a capacitor the voltage always:

    lags the current

  • 12

    Capacitor discharging: voltage decreasing, inductor charging, current will :

    increasing

  • 13

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

    reactive power

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    問題一覧

  • 1

    If frequency is reduced in the AC circuit the:

    inductive element will be damaged

  • 2

    The unit is Ohm for

    Inductive reactance(XL) ,capacitive reactance(XC) ,and impedance(Z)

  • 3

    In an AC circuit containing resistance and inductance :

    current lags the voltage by up to 90 degrees

  • 4

    To calculate inductive reactance, you need :

    inductance and frequency

  • 5

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

    31.8Ω

  • 6

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

    16 watt

  • 7

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

    50 Ω

  • 8

    Ideal coil XL=100 ohms and V=200V find power consumed V=IR then I= 200/XL

    200/100 =2A P= I²(XL) p=4*100 =400 VA

  • 9

    The power coefficient is defined as: -

    cosine of the phase shift angle between current and voltage.

  • 10

    power consumed

    =V²/R

  • 11

    In a capacitor the voltage always:

    lags the current

  • 12

    Capacitor discharging: voltage decreasing, inductor charging, current will :

    increasing

  • 13

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

    reactive power