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Physics

Physics
The part of the eye having the largest refractive index is :

Aqueous humor
Cornea
Vitreous humor
Lens

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Physics
If electric resistance is to be decreased, then the number of resistances should be connected in ________

Parallel
Series
Mixed arrangement
None of these

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Physics
Large astronomical telescopes always use as objective

lens
mirror
None of these
combinations of lenses

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Physics
What is the unit of relative density?

Kg/m
Kg/m3
Kg/m2
It has no unit

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Physics
A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will

None of these
Bend towards left
Remain straight
Bend towards right

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Physics
In the atmosphere ultraviolet rays are absorbed by

Ozone
Helium
Oxygen
Nitrogen

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