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Physics

Physics
Which of the following device is used to measure humidity?

Hygrometer
Anemometer
Hydrometer
Psycho Meter

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Physics
Which one of the following determines the sharpness of image in a camera ?

The focal length of the lens
The aperture
The exposure time
Size of the camera

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Physics
Which sources produce alternating current (AC)?

Hydro-electric generators
Batteries
All of these
Solar power plants

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Physics
A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls

By his side
In front of him
Behind him
Into his hand

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Physics
Even after sunset, the air near the Earth's surface continue to receive heat due to

Conduction
Terrestrial Radiation
Insolation
Convection

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Physics
In nuclear reactor, heavy water is used as

Fuel
Coolant
Moderator
Atomic smasher

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