1) Which is the necessary condition of gain while designing RC phase shift oscillator in order to ensure the sustained oscillations?
a. A ≥ 29
b. A ≤ 29
c. A ≠ 29
d. None of the above
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Answer
Explanation
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ANSWER: A ≥ 29
Explanation:
No explanation is available for this question!
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2) Which among the following parameters acts as an initiator for the operation of an oscillator in the absence of input signal?
a. Noise voltage
b. Noise power
c. Noise temperature
d. Noise figure
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Answer
Explanation
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ANSWER: Noise voltage
Explanation:
No explanation is available for this question!
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3) Why is the practical value of | Aβ | considered or adjusted to be slightly greater than '1'?
a. To compensate for noise voltage
b. To compensate for phase shifting of two relevant signals upto 180°
c. To compensate for non-linearities existing in the circuit
d. To compensate for the change in feedback voltage
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Answer
Explanation
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ANSWER: To compensate for non-linearities existing in the circuit
Explanation:
No explanation is available for this question!
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4) Multivibrators belong to the category of _____________
a. Square wave oscillators
b. Triangular wave oscillators
c. Ramp wave oscillators
d. Sinusoidal oscillators
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Answer
Explanation
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ANSWER: Square wave oscillators
Explanation:
No explanation is available for this question!
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5) Which among the following does not belong to the category of LC oscillators?
a. Hartley oscillator
b. Colpitt's oscillator
c. Clapp oscillator
d. Wein bridge oscillator
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Answer
Explanation
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ANSWER: Wein bridge oscillator
Explanation:
No explanation is available for this question!
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6) Which among the below mentioned oscillators does not adopt any kind of feedback mechanism?
a. Phase-shift oscillator
b. Wein bridge oscillator
c. UJT relaxation oscillator
d. All of the above
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Answer
Explanation
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ANSWER: UJT relaxation oscillator
Explanation:
No explanation is available for this question!
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7) What is an angle of phase shift for each designed RC network in the Phase Shift Oscillator circuit?
a. 30°
b. 60°
c. 90°
d. 180°
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Answer
Explanation
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ANSWER: 60°
Explanation:
No explanation is available for this question!
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8) Which among the following components is /are not involved in the feedback network configuration of LC oscillators?
a. Inductor
b. Capacitor
c. Resistor
d. All of the above
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Answer
Explanation
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ANSWER: Resistor
Explanation:
No explanation is available for this question!
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9) According to the property of tuned circuit used in LC oscillators, the decay rate is proportional to________
a. Shape & size of current pulse
b. Time constant
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Time constant
Explanation:
No explanation is available for this question!
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10) Which among the following measures is/are adopted/used for improving the frequency stability in Colpitt's oscillator?
a. Clapp oscillator
b. Temperature stabilized chamber
c. Voltage regulators
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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