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Physics

Physics
A person does some work of 1,000 J in 2 s. His power will be ________

500W
25W
1000W
50W

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Physics
Permissible noise level at Residential area during night time is :

80 dB (A)
75 dB (A)
45 dB (A)
55 dB (A)

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Physics
Temperature of distant luminous bodies can be determined by

Gas thermometers
Colour thermometers
Mercury thermometers
Pyrometers

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Physics
What is unit of Astronomical distance ?

Angstrom
Weber
Lux
Light year

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Physics
Which among the following waves is used for communication by artificial satellites ?

M.
Micro waves
Radio waves
Frequency of 1016 series

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Physics
Lens is made up of

Ordinary glass
Cobalt glass
Pyrex glass
Flint glass

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