Oscillators MCQ Questions & Answers | Electrical Engineering

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A Wien bridge oscillator uses ___________ feedback

A) Only positive B) Only negative C) Both positive and negative D) None of the above

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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

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Answer & Solution

Answer: Option B

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One condition for oscillation is ___________

A) A phase shift around the feedback loop of 180° B) A gain around the feedback loop of one-third C) A phase shift around the feedback loop of 0° D) A gain around the feedback loop of less than 1

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Answer & Solution

Answer: Option C

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An oscillator converts ___________

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

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Answer & Solution

Answer: Option B

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In a phase shift oscillator, the frequency determining elements are ___________

A) L and C B) R, L and C C) R and C D) None of the above

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Answer & Solution

Answer: Option C

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In an LC transistor oscillator, the active device is ___________

A) LC tank circuit B) Biasing circuit C) Transistor D) None of the above

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Answer & Solution

Answer: Option C

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___________ is a fixed frequency oscillator

A) Phase-shift oscillator B) Hartely-oscillator C) Colpitt's oscillator D) Crystal oscillator

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Answer & Solution

Answer: Option D

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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

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Answer: Option B

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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

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Answer & Solution

Answer: Option A

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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

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Answer & Solution

Answer: Option A

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