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Physics

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

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

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Physics
Find the current (in A) when a charge of 1200C flows in 6 seconds.

200
100
3600
7200

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Physics
The speed of sound travel fastest through

Liquid
Gas
None of these
Solid

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Physics
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?

Mirage
Rainbow
Earthshine
Halo

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Physics
Thermocouple consists of

Metal and an insulator
Two similar metals
Two dissimilar metals
Metal and a semiconductor

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Physics
When an atom loses an electron it becomes

Positive ion
Neutron
None of these
Negative ion

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