Kerala PSC Previous Years Question Paper & Answer
Page:7
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'SCIENTIFIC OFFICER (PHYSICS) -KERALA POLICE SERVICE (FORENSIC SCIENCE LABORATORY)' And exam conducted in the year 2021. And Question paper code was '019/2021'. 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.
31.
32.
33.
34.
35.
36.
37.
38.
Sky waves are refracted back to the Earth from
(A) عط mesosphere )8( the ionosphere
(९) the stratosphere (D) they penetrate the atmosphere
A free electron has a kinetic energy of 100 eV. Its de Broglie wavelength will be
(A) 2.86 nm (B) 1.226 nm
(C) 0.1226 nm (D) 0.0286 nm
Which among the following is NOT true about the Hilbert space ?
(A) & isa linear space.
(B) & isacomplete inner product space.
(C) & has a defined scalar product that is strictly positive.
(D) & is inseparable.
21
The bra matrix of the ket | ५) = | 3+1 | 8
-4
(A) (i 3-1 4) (B) @ ند —4)
(C) (-2i 3+1 4) (0) (2 -3+1 4)
If A is an operator satisfying the eigen value equation
A | ¢) = ० | $), then which among the following equations is TRUE about its inverse ?
(A) At) o)=a/o) (8) ಸಿ|) ಯೆ)
© &7|0)5०२ | ५) (0) &7|$)5०7 |)
Identify the ODD one from the following matrices:
-r/R
The potential expressed as V(r) = ४0 © is known ೩5
(A) harmonic potential (B) Yukawa potential
(6) _ hard sphere potential (D) Gaussian potential
Which among the following Hamiltonians stands for the simple harmonic oscillator ?
8 1
(^) H =ho (29) (B) HA =ho (88 + 1)
8 ^ 1
(C) 8 = 7८ (88 - 1) (0) मी =ho (aa நி
7 | (019/2021
[P.T.O.]