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Physics

Physics
The speed of light will be minimum while passing through

Water
Vaccum
Air
Glass

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Physics
Which of the following property of sound is affected by change in air temperature?

Wavelength
Amplitude
Intensity
Frequency

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Physics
The theory of relativity is presented by which scientist

Albert Einstein
Stephen Hawking
Marie Curie
Isaac Newton

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Physics
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

0 J
100 J
200 J
400 J

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Physics
The sky appears blue because of

Emision of blue wavelength by the sun
Atmospheric water vapour
Scattering of light
Reflection on sea water

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Physics
A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

P
< P
> P
2P

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