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EEE :: Time Response of Reactive Circuits

  1. If the capacitor in an integrator becomes leaky,

  2. A.
    the time constant will be effectively reduced
    B.
    the waveshape of the output voltage across C is altered
    C.
    the amplitude of the output is reduced
    D.
    all of the above

  3. Referring to the above figure, determine the voltage level that the output will reach during the pulse.

  4. A.
    0 V
    B.
    15 V
    C.
    6.3 V
    D.
    9.45 V

  5. An RC differentiator acts as a

  6. A.
    low-pass filter
    B.
    high-pass filter
    C.
    band-pass filter
    D.
    band-stop filter

  7. In an RL differentiator, when the input pulse goes from its low level to its high level,

  8. A.
    the inductor prevents a sudden change in voltage
    B.
    the inductor prevents a sudden change in current
    C.
    voltage across the inductor instantly reaches 63% of input voltage
    D.
    voltage across the inductor is zero

  9. Referring this figure, on the falling edge,

  10. A.
    the resistor voltage drops to –5 V and then goes back to zero exponentially
    B.
    the resistor voltage jumps to –5 V and then goes back to zero exponentially
    C.
    the capacitor voltage remains constant
    D.
    the resistor voltage jumps to +5 V and then decreases exponentially to zero

  11. In an RC differentiator, responding to repetitive pulses, the average value of the output

  12. A.
    is zero
    B.
    is equal to the input voltage
    C.
    is 63 percent of the input voltage
    D.
    cannot be determined

  13. The output of an RC integrator is taken across the

  14. A.
    diode
    B.
    capacitor
    C.
    resistor
    D.
    source

  15. In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant

  16. A.
    must be zero
    B.
    must be equal to the applied voltage
    C.
    is less than the applied voltage but greater than zero
    D.
    cannot be determined

  17. When a 24 V input pulse with a width equal to five time constants is applied to an RC integrator, the capacitor charges to

  18. A.
    24 V
    B.
    15.12 V
    C.
    20.64 V
    D.
    12 V

  19. If the RC time constant of an integrator is increased, as the time constant is increased

  20. A.
    the capacitor charges more during a pulse and discharges less between pulses
    B.
    the capacitor charges less during a pulse and discharges more between pulses
    C.
    the capacitor charges more during a pulse and discharges more between pulses
    D.
    the capacitor charges less during a pulse and discharges less between pulses