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 'SCIENTIFIC ASSISTANT DOCUMENTS POLICE FORENSIC SCIENCE LABORATORY' And exam conducted in the year 2016. And Question paper code was '020/2016'. 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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Maximum : 100 marks
‘Time : 1 hour and 16 minutes
1. The ratio of mobility of holes to mobility of electrons is :
(8) 2 8) 1
(0) 1 (0) 1:3
2. What happens to the Fermi level if an intrinsic semiconductor is doped with acceptor atoms?
(A) Unaffected (B) Slightly raised
(C) Slightly lowered (@) Considerably lowered
3. PIN diodes are used in which frequency range?
(A) 20Hz-20kHz (B) Less than 100Hz
(0) 20kHz-40kHz (D) Greater than 300MHa
4. Which of the following is not true for a common collector amplifier?
(५) Current gain is high (ए) Voltage gain is high
(C) Output impedance is very low (D) Input impedance is very high
5. The coefficient of the term (# — 1)? in the Taylor's series of the function (z) = 1/(2?— 9) about
the point z= lis:
=i 1
(A) a (8) 2
©) -8. =3
6و )© 12 0
6. If the uncertainty in the velocity of a particle is equal to its velocity, what is the order of
uncertainty in its location?
^ م 0) 2
ಲ 2 ae
05000 (त
22
7. The energy of the particle in three dimensional cubic box of length L is given by ae
then the degeneracy of the state is :
(A) 1 (B) 3
(© 6 छ) 12
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