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Physics

Physics
A micron is equal to

0.1 mm
0.001 mm
0.01 mm
0.0001 mm

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Physics
The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

4 T
8 T
2 T
1 T

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Physics
When an electric bulb breaks, there is an explosive sound. That is due to

None of these
The chemical reaction between the gases inside the bulb
The air outside rushing in to fill the vacuum inside the bulb
The compressed gases inside rushing out suddenly

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Physics
Sun's heat reaches us by

Reflection
Conduction
Radiation
Convection

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Physics
The angle in which a cricket ball should be hit to travel maximum horizontal distance is :

15° with horizontal
60° with horizontal
30° with horizontal
45° with horizontal

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Physics
Necessary element of change in solar energy to electrical energy

Silicon
Berillium
Pure Copper
Tantelum

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