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Physics

Physics
At low temperature, Lead behaves as a :

Semi conductor
Superconductor
Insulator
Conductor

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Physics
Which of the following features of a tunnel diode is its drawback

Very low power consumptions
Extremely high frequency response
Very wide temperature range of operations
Instability due to negative resistance

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Physics
One nanometer is equal to

10-5m
10-8m
10-6m
10-9m

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Physics
At what temperature (in Fahrenheit) pure water freezes?

48
32
37

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Physics
The instrument used to see the distant objects on the Earth is

Simple microscope
Terrestrial telescope
Astronomical telescope
Compound microscope

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Physics
Velocity of sound in air does not change with the change of

Temperature of air
Pressure of air
Wind in the direction of propagation of sound
Moisture content in air

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