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Physics

Physics
The unit of measurement of noise is

Amplifier
Hertz
Acoustics
Decibel

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Physics
Ozone layer in the outer atmosphere helps us in

Absorbing UV radiations
Absorbing cosmic ray particles
Reflecting radio waves and makes radio communication possible
Regulating the temperature of atmosphere

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Physics
Lightning heats the surrounding air to

30000 deg Cent
300 deg Cent
3000 deg Cent
300000 deg Cent

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Physics
Dioptre is the unit of

Focal length of a lens
Light intensity
Power of a lens
Sound intensity

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Physics
The unit of magnetic permeability is

Weber/meter
Henry/meter
Henry
Weber

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Physics
The velocity of falling rain drops attains a terminal value because of

Upward thrust due to air
Surface tension
Viscous force exerted by air
Air current

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MORE MCQ ON Physics

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