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Physics

Physics
Red light has a wavelength of 70 A°. In "nm" it is

0.07 nm
7 nm
700 nm
70 nm

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Physics
The flux commonly used in brazing is

Resin plus alcohol
Borax
Zinc chloride
Ammonium chloride

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Physics
What is the force of attraction between any two bodies by virtue of their masses is called?

Gravitational Force
Centripetal Force
Nuclear Force
Electromagnetic Force

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Physics
The redness in atmosphere at Sunrise and Sunset is due to :

Reflection of light
Dispersion of light
Scattering of light
Refraction of light

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Physics
Convex mirrors are used as a rear view mirror in motor cycles because

It forms real image
All of these
It forms erect (upright) image
It forms smaller image as compared with object

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Physics
The device used for measuring the wavelength of X-rays is

Mass Spectrometer
Cyclotron
G.M. Counter
Bragg Spectrometer

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