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Physics

Physics
Every hot object emits ________

X–rays
Visible light
Infrared rays
Ultraviolet rays

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Physics
If a copper wire is increased to double its length, its resistance will become

One–fourth
Half
Double
Four times

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Physics
An object with a mass of 22 kg moving with a velocity of 5 m/s possesses a kinetic energy of :

2750 J
110 J
275 J
110 J

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Physics
A star appears twinkling in the sky because of

Reflection of light by atmosphere
Scattering of light by atmosphere
Diffraction of light by atmosphere
Refraction of light by atmosphere

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Physics
Mach number is used in connection with the speed of

sound
aircraft
spacecraft
ships

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Physics
Eclipses occur due to which optical phenomena?

Refraction
Reflection
Diffraction
Rectilinear propagation

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MORE MCQ ON Physics

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