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 'Finger Print Searcher -Police Department(CAT.NO:139/2020)' And exam conducted in the year 2021. And Question paper code was '103/2021'. 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.
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“It is impossible to transfer heat from a cold body to a hot body without doing external
work.” This is
A) Planck’s statement B) Kelvin statement
C) Carnot’s statement D) Clausius’ statement
Biogas produced by the anaerobic decomposition of organic materials
A) Ethane B) Methane
C) Carbon dioxide D) Ammonia
An electrical device that converts the energy of light directly into electricity
A) Photo detector B) Laser
C) Photovoltaic cell D) Maser
What is the number of nuclei remaining after ‘n’ half life periods ?
A) N/2" 8) സീ
©) N,/0.5" D) N,/0.693"
Objects which are comprised of even number of Fermions comes under the
category
A) Mesons B) Bosons C) Leptons D) Baryons
What is the difference between a zone plate and a convex lens ?
A) Zone plate has one focal length
B) Convex lens has number of foci
C) Both have one focal length
D) Zone plate has number of foci
How is the emission of photoelectrons produced ?
A
B
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Elastic collision between a photon and a phonon
Elastic collision between a phonon and an electron
Inelastic collision between a photon and an electron
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) Elastic collision between a photon and an electron
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