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Physics

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

Green
Orange
Blue
Yellow

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Physics
Tesla is a unit of magnetic :

Induction
Field
Flux
Moment

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Physics
Hydraulic brakes in automobile work on

Pascal's principle
Bernoulli's principle
Archimedes' principle
Poiseuille's principle

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Physics
According to special theory of relativity the mass of a particle

Increases with increase in velocity with respect to an observer.
Decreases with increase in velocity.
Decreases with decrease in velocity.
Is independent of its velocity.

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Physics
If ice floating on water in a vessel melts, the water level in the vessel ________ .

Does not change
First increases before decreasing
Decreases
Increases

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Physics
Positive feedback is used in

Amplifiers
Oscillators
Rectifiers
None of these

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