One condition for oscillation is_____________?

Related Mcqs:

1. A second condition for oscillations is____________?

   A. A gain of 1 around the feedback loop
   B. No gain around the feedback loop
   C. The attention of the feedback circuit must be one-third
   D. The feedback circuit must be capacitive

2. An oscillator converts __________?

   A. power into d.c. power
   B. power into a.c. power
   C. mechanical power into a.c. power
   S. none of the above

3. For an oscillator to properly start, the gain around the feedback loop must initially be_________?

   A. 1
   B. Greater than 1
   C. Less than 1
   D. Equal to attenuation of feedback circuit

4. In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?

   A. Increased 2 times
   B. Decreased 4 times
   C. Increased 4 times
   D. Decreased 2 times

5. The piezoelectric effect in a crystal is___________?

   A. A voltage developed because of mechanical stress
   B. A change in resistance because of temperature
   C. A change in frequency because of temperature
   D. None of the above

6. ____________is a fixed frequency oscillator?

   A. Phase-shift oscillator
   B. Hartely-oscillator
   C. Colpitt’s oscillator
   D. Crystal oscillator

7. In a certain oscillator Av = 50. The attention of the feedback circuit must be___________?

   A. 1
   B. 01
   C. 10
   D. 02

8. The application where one would most likely find a crystal oscillator is____________?

   A. Radio receiver
   B. Radio transmitter
   C. AF sweep generator
   D. None of the above

9. If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?

   A. Positive
   B. Zero
   C. Negative
   D. None of the above

10. An oscillator produces___________oscillations?

    A. Damped
    B. Undamped
    C. Modulated
    D. None of the above