Electronic Devices Circuits Written Test Online Exam Quiz
Electronic Devices Circuits Written Test GK Quiz. Question and Answers related to Electronic Devices Circuits Written Test. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Written Test
The lead-lag circuit in the Wien-bridge oscillator has a resonant frequency at which the attenuation is_________
Options
A : 1/2
B : 1/4
C : 1/5
D : 1/3
For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________
Options
A : 19
B : 30
C : 29
D : 1
A circuit that can change the frequency of oscillation with an application of a dc voltage is sometimes called___________
Options
A : a crystal oscillator
B : a voltage-controlled oscillator
C : an astable multivibrator
D : a Hartley oscillator
What is the minimum frequency at which a crystal will oscillate?
Options
A : fundamental
B : seventh harmonic
C : second harmonic
D : third harmonic
Which of the following improvements is (are) a result of the negative feedback in a circuit?
Options
A : Higher input impedance
B : Better stabilized voltage gain
C : Lowered frequency response
D : Higher input impedance & Better stabilized voltage gain
The twin-T oscillator produces a ________ response.
Options
A : low-pass
B : high-pass
C : band -pass
D : band-stop
At series resonance, the impedance of a crystal is________
Options
A : minimum
B : maximum
C : equal
D : Zero
The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot.
Options
A : True
B : False
C :
D :
An input signal is needed for an oscillator to start.
Options
A : True
B : False
C :
D :
In order to start up, a feedback oscillator requires______
Options
A : unity feedback equal to 1
B : negative feedback less than 1
C : positive feedback greater than 1
D : no feedback
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