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Alternating Current Test - 39
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Alternating Current Test - 39
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  • Question 1/10
    4 / -1
    The natural frequency of a L-C circuit is equal to
  • Question 2/10
    4 / -1
    In a series LCR circuit R = 200Ω and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30°. On taking out the inductor from the circuit the current leads the voltage by 30°. The power dissipated in the LCR circuit is
    Solutions

  • Question 3/10
    4 / -1
    An LCR series with R = 100Ω is connected to a 200 V, 50 Hz ac source when only the capacitance is removed, the current leads the voltage by 60°. When only the inductance is removed, the current leads the voltage by 60°. The current in the circuit is
    Solutions

  • Question 4/10
    4 / -1

    Solutions

  • Question 5/10
    4 / -1
    In an ac series circuit, the instantaneous current is maximum when the instantaneous voltage is maximum. The circuit element connected to the source will be
  • Question 6/10
    4 / -1
    For series LCR circuit, wrong statement is
  • Question 7/10
    4 / -1
    In a purely resistive ac circuit, the current
  • Question 8/10
    4 / -1
    Two identical incandescent light bulbs are connected as show in figure. When the circuit is an ac voltage source of frequency f, which of the following observations will be correct
  • Question 9/10
    4 / -1
    An LCR circuit contains R = 50 Ω, L =1 mH and C = 0.1μF. The impedance of the circuit will be minimum for a frequency of
    Solutions

  • Question 10/10
    4 / -1
    A capacitor and an inductance coil are connected in separate ac circuits with a bulb glowing in both the circuits. The bulb glows more brightly when
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