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 'Engineering Assistant ( Electronics)/Overseer Gr-I (Electronics) - PWD (Electronics Wing) ' And exam conducted in the year 2021. And Question paper code was '137/2021'. 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.
1. A semiconductor has ___ valence electrons.
(A) 2 (B)3
(04 (D) 5
2. ൩൭ the energy gap between the conduction band and valence band of a
substance is of the order of 0.7 eV
(A) conductor (B) semiconductor
(C) insulator (D) none of the above
3. Ina Zener regulator, change in load current produces change in പ
(A) Zener current (B) Zener voltage
(©) ^ & 8 (0) None of the above
4. Maximum efficiency of a half wave rectifier is
(A) 50% (B) 25%
(C) 40.6% (D) 81.2%
5. Acenter tap full wave rectifier consists of diodes.
(A)1 (8) 2
(೦3 (೧) 4
6. What is the type of filter shown in the figure?
Vin
80
R
out
7
| ऋ
(A) Low pass filter (B) High pass filter
(C) Band pass filter (D) Band reject filter
7. In a transistor there are depletion layers.
(A)1 (8) 2
(൭3 (0) 4
8. If the value of 0011 a transistor is 0.9, then value ೦80 is
(A) 9 (B) 10
(C) 90 (D) 100
9. Where should be the bias point set in order to make transistor work as an amplifier?
(A) active (B) cutoff
(C) saturation (D) none of the above
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