Competitive Exams: Electronics MCQs (Practice_Test 3 of 13)

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  1. Consider the parallel RLC circuit having R = 1, L = 1H, C = 1F. What type of response will the circuit produce?
    1. Under damped
    2. Over damped
    3. Critically damped
    4. none of these

    Answer: a

  2. How much inductance is needed to resonate at 5 kHz with a capacitance of 12nF?
    1. 2652 H
    2. 11.844 H
    3. 3.333 H
    4. 84.33 mH

    Answer: d

  3. The difference between the half power frequencies is called the
    1. quality factor
    2. resonant frequency
    3. bandwidth
    4. cutoff frequency

    Answer: c

  4. A parallel RLC circuit has C = 0.25F & L = 2H. The value of R which will create unity damping factor is
    1. 1
    2. 2
    3. 0.5
    4. 4

    Answer: b

  5. A zero of the transfer function H (s) = 10 (s + 1) / (s + 2) (s + 3) is at
    1. 10
    2. -1
    3. -2
    4. -3

    Answer: b

  6. On the Bode magnitude plot, the slope of the pole 1/ (5 + j?) 2 is
    1. 20 dB/decade
    2. 40 dB/decade
    3. -40 dB/decade
    4. -20 dB/decade

    Answer: c

  7. On the bode phase plot, the slope of [1 + j10w-w ^ ] ^ 2 is
    1. 45° /decade
    2. 90° /decade
    3. 135° /decade
    4. 180° /decade

    Answer: d

  8. In an electric circuit, the dual of resistance is
    1. conductance
    2. capacitance
    3. open circuit
    4. inductance

    Answer: a

  9. In a series RLC circuit, which of these quality factors has the steepest curve at resonance?
    1. Q = 20
    2. Q = 12
    3. Q = 8
    4. Q = 4

    Answer: d

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