Kerala PSC Previous Years Question Paper & Answer

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

Page:8


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' 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: 8 out of 11
Excerpt of Question Code: 073/2016/OL

Question66:-The ripple factor in a rectifier circuit indicates
A:-amount of a.c. voltage present in output
B:-amount of d.c. voltage present in output
C:-change in d.c. voltage when input a.c. changes
D:-change in d.c. voltage when load. changes
Correct Answer:- Option-A
Question67:-The cathod of a zener diod in a voltage regulator is normally
A:-more positive than the anode
B:-more negative than the anode
C:-at +0.7 V
D:-grounded
Correct Answer:- Option-A
Question68:-An oscillator differs from an amplifier because
-it has more gain
:-it requres no input signals
C:-it requres no d.c. supply
D:-it always has the same output
Correct Answer:- Option-B
Question69:-If maximum and minimum amplitudes of an amplitude modulated waves are 10V and 5V respectively, the
modulation index is
൧-2
8:
:-3.3
D:-0.33
Correct Answer:- Option-D
Question70:-Thermal runaway is not possible in FET because as the temperature of FET increases
A:-the mobility decreases
B:-the transconductance increases
C:-the drain current increases
D:-none of the above
Correct Answer:- Option-A
Question71:-The dimension of Cantor set is

Correct Answer:- Option-B
Question72:-The fixed points of the Logistic map *x_(n+1)* = a’x_(n)° (1-'x_(n)*) are
A and x=1-(1)/(a)°
‘0 and 18
: and x=1/a
D:-x=1 and x=1- *(1)/(a)’
Correct Answer:- Option-A
Question73:-A stable and unstable fixed point collide each other and vanish as the control parameter is decreased in
A:-Hopf bifurcation
itchfork bifurcation
C:-Transcritical bifurcation
D:-Saddle node bifurcation
Correct Answer:- Option-D
Question74:-If 10> and (12 are eigen states of number operator which of these represent a state orthogonal to
»(L)(sqrt(2)) (10> + 11>)
A:-(1)/(sqrt(2))* (05 -112)
8:- ` (1)/(5011(2))` (0> + 12)
0112
D:-l0>
Correct Answer:- Option-A
Question75:-If In> represent an eigen vector of number operator with eigen value n, the state ataataln> has eigen value’ ~
Arn
B:-n+1

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