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Physics

Physics
The speed of light in air is

3 × 10–8 m/s
Infinity
3 × 108 m/s
8 × 103 m/s

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Physics
Addition of suitable impurities into semiconductor, is called

Diluting
Mixing
Forming
Doping

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Physics
The mercury and sodium street lamps light up because of :

Atomic emission
Electron absorption
Electron emission
Atomic absorption

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Physics
It is more difficult to walk on ice than on a concrete road because

There is more friction between the ice and feer
None of these
There is very little friction between the ice and feet pressing it
Ice is soft when compared to concrete

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Physics
The speed of light will be minimum while passing through

Glass
Vaccum
Water
Air

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Physics
One billionth of a second is called

Microsecond
Picoseconds
Nanosecond
Millisecond

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