Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Workshop Instructor/ Instructor Gr. II/ Demonstrator in Electronics Engineering' And exam conducted in the year 2023. And Question paper code was '068/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
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What instrument is used to amplify the output signal of a transducer ?
A) Peak detector B) Differential amplifier
C) Instrumentation amplifier D) Bridge amplifier
In a R-2R ladder DAC, the typical value of R ranges from
A) 3 kQ to 10 kQ B) 2.5 kQ to 10 kQ
@) 2.5 (210 10 (2 0) 4.5 kQ to 15 kQ
Which of the following oscillator can be used where high stability of frequency is
required ?
A) Hartley Oscillator B) Colpitt’s Oscillator
C) Wien Bridge Oscillator D) Crystal Oscillator
Find the frequency of oscillation of a Wien Bridge Oscillator with R = 20 kQ and
C = 0.0010 uF.
A) 7.96 kHz B) 796 kHz
C) 790 Hz D) 7.96 Hz
The output of an oscillator oscillates between OFF and ON stages freely, it is called
A) Monostable multivibrator B) Flip-flop
C) Astable multivibrator D) Schmitt trigger
A Schmitt trigger achieves hysteresis by utilising
A) Barkhousen’s principle
B) Avalanche multiplication in zenor diode
C) Re-generate positive feedback
D) The magnetic property of a transformer
Which of the following criteria should be satisfied in order to use an amplifier is an
oscillator ?
A) AB=1 B) AB =0
8<م ره D) A<(1/B)
Which of the following is the hexadecimal equivalent of the binary number
10100110101111 ?
A) 39ACF B) 29AF
C) 1EB4 D) 28AC
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