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A. Film
B. Lens
C. Aperture
D. Shutter
Answer
Answer
A. Film
Submitted by: Toheed Ahmed
When a person enters a dark room from bright light he is not able to see clearly for a little while because the ________?
A. Eye is unable to adjust itself immediately
B. Retina becomes insensitive momentarily
C. Iris is’unable to dilate the pupil immediately
D. Distance between the lens and retina take time to adjust
Answer
Answer
C. Iris is’unable to dilate the pupil immediately
Submitted by: Toheed Ahmed
What is the average adult pulse rate?
A. 72-80
C. 140-150
D. 115-125
Answer
Answer
A. 72-80
Submitted by: Toheed Ahmed
The beautiful colour patterns exhibited by a peacock in its tail feathers are due to ________?
A. Selective reflection of light
B. Selective absorption of light
C. Sinterference of light
D. Natural colour pattern of feathers
Answer
Answer
B. Selective absorption of light
Submitted by: Toheed Ahmed
A lake starts freezing because of the cold atmosphere. It will first freeze
A. At the bottom
B. In the middle part
C. At the top surface
D. Uniformly throughout the water body
Answer
Answer
C. At the top surface
Submitted by: Toheed Ahmed
The sun appears red at sunrise and sunset while it appears white at noon, because _________?
A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of diffraction leading to red end of the spectrum reaching the earth
D. Of scattering of light due to dust particles and air molecules
Answer
Answer
D. Of scattering of light due to dust particles and air molecules
Submitted by: Toheed Ahmed
An astronaut inside a spacecraft is in a state of weightlessness. This implies that __________?
A. The mass of the astronaut is reduced to zero
B. The astronaut and the spacecraft are both in a free-falling state
C. Gravity inside the spacecraft ceases to act
D. The astronaut is outside the influence of the earth’s gravitational force
Answer
Answer
B. The astronaut and the spacecraft are both in a free-falling state
Submitted by: Toheed Ahmed
An iceberg is floating in sea. How much of mass will remain above the surface of water?
A. One fourth
B. One tenth
C. One third
D. One fifth
Answer
Answer
B. One tenth
Submitted by: Toheed Ahmed
The cow’s milk contains how much amount of water in terms of percentage?
A. 80%
B. 65%
C. 72%
D. 60%
Answer
Answer
A. 80%
Submitted by: Toheed Ahmed
Most of the ozone in the atmosphere is _________?
A. Mesosphere
B. Troposphere
C. Stratosphere
D. Ionosphere
Answer
Answer
C. Stratosphere
Submitted by: Toheed Ahmed