Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Increasing the radius of the capillary tube
None of these
Increasing the height of water in the vessel
Decreasing the radius of the capillary tube

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Physics
The term ''equinox' means

The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon
The path which the Earthtakes around the Sun
The axis of the Earth around which it rotates
When the day and night are of equal duration

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Physics
Stars twinkle because

the refractive index of the different layers of the earth's atmosphere ch
the distance of the stars from the earth changes with time.
None of these
the intensity of light emitted by them changes with time.

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