An important limitation of a crystal oscillator is____________?

A. Its low output
B. Its high q
C. Less availability of quartz crystal
D. Its high output

The value of negative feedback fraction is always _______________?

A. Less than 1
B. More than 1
C. Equal to 1
D. None of the above

The Q of the crystal is of the order of____________?

A. 100
B. 1000
C. 50
D. More than 10,000

When negative voltage feedback is applied to an amplifier, its voltage gain ____________?

A. Is increased
B. Is reduced
C. Remains the same
D. None of the above

In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency____________?

A. Remains the same
B. Decreases
C. Increases
D. Insufficient data

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

An oscillator differs from an amplifier because it_____________?

A. Has more gain
B. Requires no input signal
C. Requires no d.c. supply
D. Always has the same input

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

In an LC circuit, when the capacitor is maximum, the inductor energy is____________?

A. Minimum
B. Maximum
C. Half-way between maximum and minimum
D. None of the above

The output impedance of an emitter follower is______________?

A. High
B. Very high
C. Almost zero
D. Low