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Alternating Current Test - 25
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Alternating Current Test - 25
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  • Question 1/10
    4 / -1
    The average power dissipated in AC circuit is 2 W. If a current flowing through a circuit is 2 A impedance is 1Ω, what is the power factor of the AC circuit?
    Solutions

  • Question 2/10
    4 / -1
    If VAB =VAc, then X is

  • Question 3/10
    4 / -1
    A series R-C circuit is connected to AC voltage source. Consider two cases (A) when C is without a dielectric medium and (B)when C is filled with dielectric of constant 4. The current IR through the resistor and voltage VC across the capacitor are compared in the two cases. Which of the following is/are true?
    Solutions

  • Question 4/10
    4 / -1
    In the L-C-R circuit shown, the impedance is

    Solutions

  • Question 5/10
    4 / -1
    In a series L-C-R circuit R = 200 Ω and the voltage and the frequency of the main supply is 220V 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 L-C-R circuit is
    Solutions

  • Question 6/10
    4 / -1
    Assertion (A) In a series R-L-C circuit the voltages across resistor, inductor and capacitor are 8 V, 16 V and 10 V respectively. The resultant emf in the circuit is 10 V.
    Reason (R) Resultant emf of the circuit is given by the relation.

    Solutions

  • Question 7/10
    4 / -1
    In a series resonant R-L-C circuit, the voltage across R is 100 V and the value of R =1000Ω.The capacitance of the capacitor is 2 × 10-6 F; angular frequency of AC is 200 rad s -1. Then the potential difference across the inductance coil is
    Solutions

  • Question 8/10
    4 / -1
    A resistor of R = 6 Ω, an inductor of L =1H and a capacitor of C =17.36µF are connected in series with an AC source. Find the Q -factor.
    Solutions

  • Question 9/10
    4 / -1
    The values of L, C and R for a circuit are 1H, 9F and 3 Ω. What is the quality factor for the circuit at resonance?
    Solutions

  • Question 10/10
    4 / -1

    Solutions

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