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Physics

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

Blue
Yellow
Orange
Green

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Physics
A periscope works by the principle of

Reflection
Total internal reflection
Refraction
Diffraction

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Physics
Pipelines in cold countries often burst in winter, because

Pipelines contract in their volume
Water freezes and expands in its volume
Temperature of ice is less than that of water
Pipelines expand due to freezing

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Physics
No current will flow between two charged bodies if they have the same

Charge/ potential ratio
Charge
Resistance
Potential

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Physics
stars which appear single to the naked eye but are double when seen through a telescope are

quasars
asteroids
novas and supernovas
binaries

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Physics
A fountain pen works on the principle of

Flow of liquids from higher to lower potential
Viscosity of liquids
Bernoulli's principle
Capillary action

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MORE MCQ ON Physics

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