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 'Electrician in KSFDC, Tourism, Agriculture etc' And exam conducted in the year 21. And Question paper code was '121/21'. 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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The output voltage of an ideal voltage source 15 :
(^) zero (8)
(C) dependent on load resistance (D)
A semiconductor has generally
(A) 6 (B)
(0)
constant
dependent on internal resistance
Valance electrons.
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Which method can be used for measuring low and medium value of resistance?
(^) Substitution method (8)
(C) Voltmeter and ammeter method (D)
The 8.1. unit of specific resistance is :
(A) ohm-meter (B)
(0೮) ohm/ meter (D)
Kelvin bridge method
Wheat stone bridge method
ohm /cm
micro ohm / cm?
According to Kirchhoff’s law, the algebraic sign of an ‘IR’ drop is primarily dependent upon
the:
(A) amount of current flowing it (8)
(C) value of resistance (D)
What is the value of resistance in an open circuit?
(^) Zero (B)
(C) Infinity (D)
What is the unit of Reluctance?
(A) Weber / metre? (8)
(C) Ampere turns / metre?
Which is the cause for changing the Permeability?
(^) Flux density (8)
(0) Field intensity
direction of current flow
battery connection
Low
High
Weber / meter
൯) Ampere turns / Weber
Magneto motive force
(D) Reluctance
A substance that has a high retentiveness can be used for the manufacture of :
(ಹ) Electromagnet (8)
(C) Temporary magnet
121/2021 4
(D)
Permanent magnet
Paramagnets