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 'Junior Instructor (Electronic Mechanic)' And exam conducted in the year 2023. And Question paper code was '081/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. 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.
C:-(ii) and (iii)
D:-(i) and (iii)
Correct Answer:- Option-C
Question16:-Which of the following defines base transportation factor of an NPN
transistor?
A:-The ratio of the number of electrons arriving at collector to the number of
emitted electrons
B:-The ratio of the electron current to the total emitter current
C:-Ratio of the collector current to the emitter current
D:-Ratio of collector current to base current
Correct Answer:- Option-A
Question17:-Which transistor configuration has very high input resistance and very
low output resistance?
A:-Common Base
B:-Common Emitter
C:-Common Collector
D:-Both CB and CE
Correct Answer:- Option-C
Question18:-The current gain a of a transistor is 0.99. What is the value of its B?
A:-0.5
B:-99
C:-9.9
D:-198
Correct Answer:- Option-B
Question19:-In a BJT amplifier, the Q-point is stabilized by
A:-Keeping the temperature constant
B:-Keeping the base current constant
C:-Changing the base current to keep rc and v-z-constant
D:-Changing the emitter current to keep iz and vse constant
Correct Answer:- Option-C
Question20:-Factors that affect the lower cut-off frequency of a RC coupled CE
amplifier are
(i) Ineffective bypassing of emitter bypass capacitors
(ii) Bypassing effect of junction capacitances
(iii) Signal loss across coupling capacitors
(iv) Loading effect of subsequent stages
A:-(i) and (ii)
B:-(ii) and (iii)