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Physics

Physics
Which Color has the Longest Wavelength?

Red
White
Violet
Yellow

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Physics
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :

0.21111111111111
0.20902777777778
0.12777777777778
0.12638888888889

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Physics
Bolometer is used to measure

Wavelength
Velocity
Temperature
Frequency

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

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

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Physics
The Hydraulic Break works on the principle of ________ .

Bernouli's law
Boyle's law
Coulomb's law
Pascal's Law

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Physics
Global warming is expected to result in

Increase in level of sea
Change in coast line
Change in crop pattern
All of these

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