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Physics

Physics
The energy of a photon varies directly with its

Wave length
Speed
None of these
Frequency

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Physics
The absolute zero is a temperature at which ________

All gases become liquid
Molecular motion in a gas would cease
All gases become solid
Water freezes

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Physics
Which of the following is not reversible?

Seebeck effect
Joule effect
Thomson effect
Peltier effect

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Physics
A soap bubble shows colours when illuminated with white light. This is due to

Polarisation
Interference
Reflection
Diffraction

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Physics
The best material for the core of a transformer is

Mild steel
Stainless steel
Hard steel
Soft iron

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Physics
The scientist who first sent electromagnetic waves to distant places is

James Clerk Maxwell
John Logie Baird
Thomas Alva Edison
Heinrich Hertz

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