1.

    A variable capacitor is connected to an inductor of inductance 20 mH. For what capacitance will the circuit resonate at a frequency of 1 kHz?

    A

    12.7 nF

    B

    1.27 nF

    C

    0.127 nF

    D

    127 nF

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Resonant Frequency, L-C Oscillations

    Related Questions

    1.

    Power factor of series LCR circuit at resonance is

    A

    12\frac{1}{{\sqrt 2 }}

    B

    32\frac{{\sqrt 3 }}{2}

    C

    1

    D

    Zero

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Power factor, Resonance, LCR circuit

    2.

    Power factor of series LCR circuit at resonance is

    A

    12\frac{1}{{\sqrt 2 }}

    B

    32\frac{{\sqrt 3 }}{2}

    C

    1

    D

    Zero

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Power factor, Resonance, LCR circuit

    3.

    A circuit draws 330 W from a 110V, 60 Hz AC line. The power factor is 0.6 and the current lags the voltage. The capacitance of a series capacitor that will result in a power factor of unity is equal to

    A

    31μF

    B

    54μF

    C

    151μF

    D

    201μF

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Power factor, Reactive power, Capacitance, AC circuits

    4.

    2.5πμF\frac{{2.5}}{\pi }\mu F capacitor and 3000-ohm resistance are joined in series to an ac source of 200 volt and 50sec−150se{c^{ - 1}} frequency. The power factor of the circuit and the power dissipated in it will respectively be

    A

    0.6, 0.06 W

    B

    0.06, 0.6 W

    C

    0.6, 4.8 W

    D

    4.8, 0.6 W

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :capacitive reactance, impedance, power factor, power dissipation in AC circuit

    5.

    The power factor of good choke coil is

    A

    Nearly zero

    B

    Exactly zero

    C

    Nearly one

    D

    Exactly one

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Alternating Current
    🎯Topic:Resontant Frequency, L-C Oscillations
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :power factor, choke coil, inductance

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