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Study MCQ
Electronics Mechanic
OSCILLATORS
Set 2
Set 2
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Q4404
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How many time constants required to change a capacitor to 63.2% of its full charge voltage?
A
Four time constant
B
Three time constant
C
Two time constant
D
One time constant
Q4405
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Which circuits commonly use parallel-fed Hartley oscillators?
A
Stereo amplifiers
B
Radio receivers
C
Television receivers
D
Automatic voltage stabilizers
Q4406
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What type of arrangement is required to sustain the oscillations of the oscillator circuit?
A
Provide negative feedback
B
Provide regenerative feedback
C
Increase the bias voltage
D
Increase the value of inductor
Q4407
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What type of feed back is used by the Wein-bridge oscillator to oscillate the signal?
A
No feedback
B
Positive feedback
C
Negative feedback
D
Both positive and negative feedback
Q4408
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How to improve the frequency stability in oscillator circuits?
A
Increase the supply voltage
B
By using quartz crystal
C
Using L and C
D
Improve the property of circuits
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