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Physics

Physics
Heat from the Sun reaches the Earth by

Radiation
Reflection
Convection
Conduction

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Physics
Which of the following has the lowest frequency?

Visible light
Ultra violet rays
Gamma rays
Xrays

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Physics
Which of the following are used for accurately measuring very small time intervals ?

White dwarfs
Pulsars
Quartz clocks
Atomic clocks

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Physics
A device which is used to limit the current in an electrical circuit is called a

Hub
Conductor
Grid
Fuse

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Physics
The modulus of rigidity is the ratio of

Shearing stress to shearing strain
Volume stress to volume strain
Longitudinal stress to longitudinal strain
Tensile stress to tensile strain

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Physics
Refrigeration is a process which

Inactivates the bacteria
Slows down the bacterial growth
Plasmolyses the bacteria
Kills bacteria

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