Kerala PSC Previous Years Question Paper & Answer
Page:5
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Laboratory Assistant Common Facility Service Centre' And exam conducted in the year 2023. And Question paper code was '019/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. 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.
A:-The principal axis
B:-Focal point
C:-Pole of the mirror
D:-Infinity
Correct Answer:- Option-C
Question23:-Refractive index of normal optical materials is always
A:-Greater than one
B:-Less than one
C:-Equal to one
D:-Equal to zero
Correct Answer:- Option-A
Question24:-The principle of light propagation through an optical fiber is
A:-Dispersion
B:-Refraction
C:-Magnification
D:-Total internal reflection
Correct Answer:- Option-D
Question25:-The SI unit of power of a lens is
A:-Watt
B:-Dioptre
C:-Joule
D:-It has no unit
Correct Answer:- Option-B
Question26:-When we look at nearer objects, lenses in our eyes are contracted and
A:-Curvature of the lens increases and focal length decreases
B:-Curvature of the lens decreases and focal length increases
C:-Both curvature of the lens and focal length increases
D:-Both curvature of the lens and focal length decreases
Correct Answer:- Option-A
Question27:-The persistence of vision for human eye is approximately
A:-16s
8:-1/16 5
C:-60 s
D:-1/60 s
Correct Answer:- Option-B
Question28:-Mechanical waves are