Officerswiki is a free education & learning platform for all students and working professionals, where they can practice multiple choice questions & answers (MCQs). These all MCQs on Officerswiki are FreeMcqs which are helpful in all types of exams such as PPSC, FPSC, CSS, NTS, PMS and UPSC. Read all these questions and answer for your knowledge.
It is possible to recognize a person in the dark by simply hearing his unique voice . Is it because of the_______?
A. pitch
B. Frequency
C. Time period
D. Quality
E. None of these
When a ray of sunlight enters a dark room , its straight path becomes visible because of dust particles hanging in the air. It is because light is _________?
A. Visible
B. Transparent
C. Invisible
D. opaque
E. None of these
A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?
A. 6 feet
B. 12 feet
C. 4 feet
D. 3 feet
E. None of these
A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?
A. 6 feet
B. 12 feet
C. 4 feet
D. 3 feet
E. None of these
Magnifying power of a simple microscope be increased by ?
A. increasing focal length of the lens
B. Decreasing focal length of the lens
C. Lens of large aperture
D. lens of short aperture
E. None of these
A nuclear reactor is a device used to carry out a controlled nuclear reaction whereas a GM counter is a device used to detect?
A. Current
B. Voltage
C. Nuclear Radiation
D. power
E. None of these
A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
A. 25 miles per sec
B. 60 miles per sec
C. 7 miles per sec
D. 10 miles per sec
E. None of these
Night vision is possible with the help of ___________?
A. Red light
B. Violet light
C. Infrared Rays
D. Ultraviolet Light
E. None of these
Myopia is a defect of Human eye. Can it be corrected by using a lens called?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Plano convex lens
E. None of these
The instrument which I specially designed for recording earthquake waves is called seismograph which measures earthquake waves on a ____________
A. Diatonic scale
B. Fahrenheit Scale
C. Richter scale
D. Celsius Scale
E. None of these
In humans , most nutrient molecules are absorbed by the
A. Small intestine
B. Stomach
C. Liver
D. Large intestine
E. None of these
In humans most nutrient molecules are absorbed by the, A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?,Magnifying power of a simple microscope be increased by ?
