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Physics

Physics
Parsec is the unit of

Time
Intensity of light
Distance
Magnetic line

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Physics
Light travels fastest in

Water
Diamond
Air
Glass

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Physics
These waves cannot be transmitted through vacuum.

Electromagnetic
Sound
Light
Heat

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Physics
A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.

The mercury level does not change
The mercury level starts rising
The mercury level starts falling
The bell jar breaks up

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Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

-4.33 diopters
-12.33 diopters
4.33 diopters
12.33 diopters

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Physics
Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

Rough black
Shining white
Rough white
Shining black

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