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Physics

Physics
Electric Motor converts ________ energy to mechanical energy

Electrical
Sound
Chemical
Mechanical

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Physics
Which of the following is not reversible?

Seebeck effect
Peltier effect
Joule effect
Thomson effect

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Physics
A system exhibiting S.H.M. must possess

Inertia only
Elasticity only
Elasticity, inertia and an external force
Elasticity as well as inertia

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Physics
Among the following materials sound travels fastest in

Air
Water
Vacuum
Steel

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Physics
The function of ball bearings in a wheel is :

To convert static friction into kinetic friction
Just for convenience
To convert kinetic friction into rolling friction
To increase friction

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Physics
Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted.

Shining white
Rough black
Rough white
Shining black

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