## Kerala PSC Previous Years Question Paper & Answer

Title : HSST PHYSICS SR FOR SC/ST KHSE
Question Code : A

Page:4

Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'HSST PHYSICS SR FOR SC/ST KHSE' And exam conducted in the year 2016. And Question paper code was '073/2016/OL'. 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.

page: 4 out of 11
Excerpt of Question Code: 073/2016/OL

Question28:-Two particles of same mass m are emitted in the same direction with momenta 5mc and 10mc respectively{c is
the speed of light). As seen from the slower one, what is the speed of the faster particle?

A:-0.595¢

B:-0.425¢

C:-0.795¢

D:-0.85¢

Question29:-Which of the following has positive intrinsic curvature?

B:-Plane

C:-Sphere

D:-Cylinder

Question30:-A particle is constrained to move on a plane, where it is attracted towards a fixed point with force is inversely
proportional to square of the distance from the point. What is the Lagrangian of the particle in polar coordinates?

A= (mdotr™(2)+mr~(2)dottheta™ “ங்‌
mdotr™(2)}/(2)" +" (k) (r}"
ள்‌ “ம்‌
D:-" (mdotr™(2)}/2)" + (mr~(2)dottheta™(2))/(2)"
Question31:-The de-Broglie wavelength of an electron accelerated to a potential difference of V volts is
A:-'sqri{(150)/(V))" “dotA™ ™
B:-*(h)/(sqrt{2mE)" “dotA™
ஙே “ண்ட்‌
D:-*hsqrt{{150)/(meV))™*" ` 404.
Question32:-The electron orbit in 8 ground state hydrogen atom is in circumference equals 1௦
A:-one de-Broglie wave length
B:-Two de-Broglie wave length
C:-Ten de-Broglie wave length
D:-Twelve and half de-Broglie wave length
Question33:-In case more than one linearly independent wave functions belong to the same energy E, the level is said to be
A:-orthogonal
B:-orthonormal
C:-degenerate
D:-non-degenerate
Question34:-The particle confined within the potential well displays
A:-discrete series of energy
B:-continuous series of energy
C:-both continuous and discrete series at time
D:-none of the above
Question35:-If the uncertainty in momentum A'p_(x)* is known, then A’p_(y}® will be
A:-equal to 270 00”
B:-3.33x7107(-10)" 210007
05010010” 210 00
D:-impossible to say
Question36:-A golf ball of 46 gm travels at 30 mys. The wave length associated with it is
;എ.80 10-34)” 1
48X 10°(-34)" m
“4,830 10“(-36)' ಗಾ
D:-0.048x"107(-34)" ಗಾ