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Physics

Physics
Instrument used to study the behaviour of a vibrating string is :

Barometer
Hydrometer
Hygrometer
Sonometer

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Physics
Lux is the SI unit of

intensity of illumination
luminous efficiency
luminous flux
luminous intensity

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Physics
What is the wavelength of visible spectrum ?

3900 A° – 7600 A°
7800 A° – 8000 A°
1300 A°–3000 A°
8500 A° – 9800 A°

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Physics
Pipelines in cold countries often burst in winter, because

Temperature of ice is less than that of water
Water freezes and expands in its volume
Pipelines expand due to freezing
Pipelines contract in their volume

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Physics
Least audible sound for most of the human ear is :

5.0 µ bar
0.0002 µ bar
10.0 µ bar
0.005 µ bar

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Physics
An object which absorbs all colours and reflects none appears:

Black
White
Blue
Grey

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MORE MCQ ON Physics

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