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Physics

Physics
The radiation initially produced in fluorescent tube is

X-rays
Ultraviolet
Infrared
Microwaves

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

Shining white
Rough white
Shining black
Rough black

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Physics
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? I.Diffusion II.Refraction III.Internal reflection

I, II and III
I and III
II and III
I and II

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Physics
In a water lifting electric pump, we convert

Kinetic energy into Electrical energy
Kinetic energy into Potential energy
Electrical energy into Kinetic energy
Electrical energy into Potential energy

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Physics
Which of the following is not true about X-rays?

Can affect photographic plates
Can be reflected or refracted
Have low penetrating power
Travel with the speed of light

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Physics
Which electromagnetic radiation is used for satellite communication ?

Ultraviolet
Millimeter wave
Infrared
Radiowave

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