The Q of the crystal is of the order of____________?
A. 100
B. 1000
C. 50
D. More than 10,000
Oscillators
In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency____________?
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 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_____________?
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___________?
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____________?
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
A Wien bridge oscillator uses___________feedback?
A Wien bridge oscillator uses___________feedback?
A. Only positive
B. Only negative
C. Both positive and negative
D. None of the above
Quartz crystal is most commonly used in crystal oscillators because:____________?
Quartz crystal is most commonly used in crystal oscillators because:____________?
A. It has superior electrical properties
B. It is easily available
C. It is quite inexpensive
D. None of the above
The signal generator generally used in the laboratories is___________oscillator?
The signal generator generally used in the laboratories is___________oscillator?
A. Wien-bridge
B. Hartely
C. Crystal
D. Phase shift
In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?
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