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Physics

Physics
Sun's heat reaches us by

Convection
Reflection
Conduction
Radiation

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Physics
Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.

4 only
3 and 4 only
1, 2 and 3 only
1, 2, 3 and 4

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Physics
In the atmosphere ultraviolet rays are absorbed by

Nitrogen
Ozone
Helium
Oxygen

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Physics
The distance between node and adjacent antinode is 30 cm. The wavelength is

120 cm.
60 cm.
90 cm.
30 cm.

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Physics
The transport phenomenon occurs only in ________ state of a gas and is ________

Equilibrium, reversible
Non-equilibrium, reversible
Equilibrium, irreversible
Non-equilibrium, irreversible

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Physics
Which of the following is the unit of perceived loudness of sound ?

Decibel
Hertz
Phon
Sone

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