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Physics

Physics
Which one of the following wavelengths of light is most effective in photosynthesis ?

Green
Yellow
Orange
Blue

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Physics
The swing of a spinning cricket ball in air can be explained on the basis of

Buoyancy of air.
Turbulence caused by wind.
Bernoulli's theorem.
Sudden change in wind direction.

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Physics
Energy is continuously created in the sun due to:

Radioactivity
Nuclear fusion
Nuclear fission
Artificial radioactivity

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Physics
An optically plane surface reflects a beam of light

As parallel beams in all directions
As a diffused beam in one direction
As diffused beams in all directions
As a parallel beam in one direction

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Physics
The average kinetic energy of the molecules of an ideal gas is directly proportional to

Mass of Molecules
Absolute temperature of the gas
Velocity of Molecules
Temperature of environment

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Physics
Rectifiers are used to convert:

Low voltage to high voltage
High voltage to low voltage
Alternating current to Direct current
Direct current to Alternating current

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