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Physics

Physics
Stars appear twinkling because of ......... of light.

Reflection
Scattering
Emission
Absorption

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Physics
Hydraulic brakes in automobile work on

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

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Physics
Which of the following parts of the sunlight makes the solar cooker hot ?

Red light
Ultra violet
Cosmic rays
Infra red

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Physics
Which one of the following physical quantities has the same dimensions as that of Planck's constant?

Potential energy
Linear momentum
Force
Angular momentum

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Physics
A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

A vertical straight line
A horizontal straight line
A parabola
A circle

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Physics
Large astronomical telescopes always use as objective

lens
mirror
None of these
combinations of lenses

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