Home / ECE / Analog Electronics :: Section 4

ECE :: Analog Electronics

  1. If the Q of a single stage single tuned amplifier is doubled, the bandwidth will

  2. A.
    remain the same
    B.
    become half
    C.
    become double
    D.
    become four times

  3. In full wave rectification, if the input frequency is 50 Hz, then frequency at the output of filter is

  4. A.
    50 Hz
    B.
    0 Hz
    C.
    100 Hz
    D.
    75 Hz

  5. The circuit in the given figure is

  6. A.
    low pass filter
    B.
    high pass filter
    C.
    band Pass filter
    D.
    band reject filter

  7. The turn ratio of a transformer is 20:1, if a load of 10Ω is connected across the secondary, what will be the effective resistance seen looking into the Primary?

  8. A.
    2 kΩ
    B.
    4 kΩ
    C.
    8 kΩ
    D.
    32 kΩ

  9. In a CE amplifier circuit the ac voltage between emitter and ground

  10. A.
    is very high
    B.
    may be high or low
    C.
    is zero
    D.
    depends on circuit configuration

  11. A 120 V, 30 Hz source feeds a half wave rectifier circuit through a 4 : 1 step down transformer, the average output voltage is

  12. A.
    30 V
    B.
    13.5 V
    C.
    10 V
    D.
    7.07 V

  13. The slew rate of an ideal op-amp is

  14. A.
    very slow
    B.
    slow
    C.
    fast
    D.
    infinitely fast

  15. Regulation of the DC power supply of 12 V, 100 mA is the effective resistance of power supply is 20 Ω

  16. A.
    22%
    B.
    131%
    C.
    30%
    D.
    20%

  17. A bridge diode circuit using ideal diodes has in input voltage of 20 sin ωt volts. The average and rms values of output voltage are


  18. In the circuit of figure v1 = 8 V and v2 = 0. Which diode will conduct (Assume ideal diodes)?

  19. A.
    D1 only
    B.
    D2 only
    C.
    Both D1 and D2
    D.
    Neither D1 nor D2