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ECE :: Analog Electronics

  1. Heat sink results in

  2. A.
    slower dissipation of heat to atmosphere
    B.
    faster dissipation of heat to atmosphere
    C.
    lower ambient temperature
    D.
    lower transistor power

  3. A buffer amplifier should have

  4. A.
    high input impedance and low output impedance
    B.
    high input impedance and high output impedance
    C.
    low input impedance and high output impedance
    D.
    low input impedance and low output impedance

  5. In a CE amplifier, the output voltage is equal to product of

  6. A.
    ac collector current and ac collector resistance
    B.
    ac base current and ac collector resistance
    C.
    ac emitter current and ac emitter resistance
    D.
    ac collector current and source resistance

  7. In figure, VG =

  8. A.
    2.22 V
    B.
    22.2 V
    C.
    0.22 V
    D.
    0.022 V

  9. A diode can have a very high forward resistance.

  10. A.
    True
    B.
    False

  11. In figure the voltage drop across diode is 0.7 V. Then the voltage across diode during negative half cycle is

  12. A.
    10 V
    B.
    9.3 V
    C.
    zero
    D.
    10.7 V

  13. In figure vi = 10 mV dc maximum. The maximum possible dc output offset voltage is

  14. A.
    60 mV dc
    B.
    110 mV dc
    C.
    130 mV dc
    D.
    150 mV dc

  15. A transistor with a = 0.9 and ICBO = 10 μA is biased so that IBQ = 90 μA. Then ICQ will be

  16. A.
    910 mA
    B.
    5 mA
    C.
    5.25 mA
    D.
    4.95 mA

  17. For the circuit of figure the critical frequency is


  18. The current through R1 is(If β = 99, VBE = 0.74 V)

  19. A.
    0.1 mA
    B.
    0.35 mA
    C.
    0.2 mA
    D.
    none