Apr
12
Thermos flask keeps a liquid hot because ?
A. It has silver coated walls
B. It has double walls
C. Heat losses by conduction and radiation are largely prevented
D. Air between the double walls is removed
Category: Physics Mcqs
Physics Mcqs
Apr
12
Why it is easier to swim in a sea than a river ?
A. Density of sea water is more than river water
B. River water is moving
C. Sea water has more salinity
D. None of the above
Apr
12
Moon has no atmosphere because of ?
A. Moon has no living things
B. Absence of plants
C. Root mean square of velocity of all gasses is more than their escape velocity on moon’s surface
D. Both A & B
Apr
12
The stars twinkle in the night because of ?
A. They emit light intermittently
B. The earth’s atmosphere absorbs light intermittently
C. The star’s atmosphere absorb light intermittently
D. The refractive index of the air in atmosphere fluctuates
Apr
12
Existence on moon is not possible because of ?
A. High Pressure
B. Low Pressure
C. Absence of Air
D. Its weak gravitational power
Apr
12
Oil rises up the wick in a lamp because ?
A. Oil is very light
B. Oil is volatile
C. Diffusion of oil through the wick
D. Capillary action phenomena
Apr
12
Pressure cooker is quicker in cooking rice because of ?
A. It lets the steam escape
B. High pressure rises the boiling point of water
C. High pressure crushes the hard covering of rice grains
D. None of the above
Apr
12
The light coming from the stars gives the idea of their ?
A. Size
B. Rotation
C. Mass
D.Temperature
Apr
12
During Solar Eclipse ?
A. Sun is between Earth and Moon
B. Earth is between Sun and Moon
C. Moon is between Earth and Sun
D. None of the above
Apr
12
Sunlight reaches to the Earth in how much time ?
A. 492 Seconds
B. 494 Seconds
C. 496 Seconds
A. 498 Seconds