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Alternating Current Test - 50
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Alternating Current Test - 50
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  • Question 1/10
    4 / -1
    When 100 volt dc is applied across a coil, a current of 1 amp flows through it. When 100 volt ac at 50 cycle s–1 is applied to the same coil, only 0.5 ampere current flows. The impedance of the coil is
    Solutions

  • Question 2/10
    4 / -1
    The coefficient of inductor of a choke coil is 0.1 H and resistance is 12 Ω. If it is connected to an alternating current source of frequency 60 Hz, then power factor will be
    Solutions

  • Question 3/10
    4 / -1
    For series LCR circuit, wrong statement is
  • Question 4/10
    4 / -1
    In a purely resistive ac circuit, the current
  • Question 5/10
    4 / -1
    If an 8 Ω resistance and 6 Ω reactance are present in an ac series circuit, then the impedance of the circuit will be
    Solutions

  • Question 6/10
    4 / -1
    A 12 ohm resistor and a 0.21 henry inductor are connected in series to an ac source operating at 20 volts, 50 cycle/second. The phase angle between the current and the source voltage is
    Solutions

  • Question 7/10
    4 / -1
    What will be the phase difference between virtual voltage and virtual current, when the current in the circuit is wattless
    Solutions

  • Question 8/10
    4 / -1
    In the non-resonant circuit, what will be the nature of the circuit for frequencies higher than the resonant frequency
    Solutions

  • Question 9/10
    4 / -1
    A 220 V, 50 Hz ac source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?
    Solutions

  • Question 10/10
    4 / -1
    The quality factor of LCR circuit having resistance (R) and inductance (L) at resonance frequency (ω) is given by
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