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 'Lecturer in Electrical and Electronics Engineering TechnicalEducation (Polytechnics)' And exam conducted in the year 2023. And Question paper code was '131/2023'. 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.
40. Emitter follower amplifier has :
(A) Low input resistance and low output resistance
(B) High input resistance and low output resistance
(C) Low input resistance and high output resistance
(D) High input resistance and high output resistance
41. The factors which affects the operating point stability are :
(A) Temperature ൯) Aging of transistor
(C) Transistor parameters (D)_ All the above factors
42. When the input to class C amplifier is a sine wave, the output current will flow?
(^) Half the cycle (B) More than half cycle
(C) Less than half cycle () Fullcycle
43. The reduction in voltage gain in the low frequency region of an RC coupled amplifier is due to
the presence of :
(ಹ) Coupling capacitor (B) Output shunt capacitance
(C) Voltage divider biasing (D) Input shunt capacitance
44. An amplifier has a voltage gain of 100. To reduce distortion 5% negative feedback is
employed. The gain of the amplifier with feedback is :
(A) 16.67 (B) 5
(C) 50 () 667
45. RC phase shift oscillator employing BJT has angular frequency of oscillation w, (n = R,/ R):
1 3 1
A =, ൪൫ 2.
RC RC 46 + 4
1 1 1 1
(© ட سے ط۔ (مك
RC و9دلہ RC ہہ + 6ل
46. Inthe given circuit, V, = +4V, V, =+1V,R1,R2, R3 and Rf =1K R1 = 10K, V, will be:
Rf
~ ಬ್
Va
Vo
Vo
Differential amplifier using one op-amp
(A) +87 (B) 87
(C) +5V (D) -5V
A 9 131/2023
[P.T.0.]