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Alternating Current Test - 20
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Alternating Current Test - 20
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  • Question 1/10
    4 / -1
    There is a 5Ω resistance in an ac circuit. Inductance of 0.1 H is connected with it in series. If equation of ac e.m.f. is 5 sin 50t, then the phase difference between current and e.m.f. is
    Solutions

  • Question 2/10
    4 / -1
    In LCR circuit the pd between the terminals of the inductance is 60V, between the terminals of the capacitor is 30V and that between the terminals of resistance is 40V, The supply voltage will be equal to
    Solutions

  • Question 3/10
    4 / -1
    In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be change from L to
    Solutions

  • Question 4/10
    4 / -1
    In an LCR series ac circuit, the voltage across each of the components, L, C and R is 50 V. The voltage across the LC combination will be
    Solutions

  • Question 5/10
    4 / -1
    An inductance of (200/π) mH, a capacitance of (10 ̶ 3/π)F and a resistance of 10Ω are connected inseries with an ac source 220 V, 50 Hz. The phase angleof the circuit is
    Solutions

  • Question 6/10
    4 / -1
    An inductor L and a capacitor C are connected in the circuit as shown in the figure. The frequency of the power supply is equal to the resonant frequency of the circuit.Which ammeter will read zero ampere?

  • Question 7/10
    4 / -1
    Which of the following components of an LCR circuit, with as supply, dissipates energy
  • Question 8/10
    4 / -1
    In a choke coil, the reactance XL and resistance R are such that
    Solutions

  • Question 9/10
    4 / -1
    The phase difference between the ac and emf is π/2. Which of the following cannot be the constituent of the circuit
  • Question 10/10
    4 / -1
    In a series resonant LCR circuit, the voltage across R is 100 volts and R =1 kΩ with C = 2 µF. The resonant frequency ω is 200 rad/s. At resonance the voltageacross L is
    Solutions

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