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Physics

Physics
At the center of the sun, fusion converts hydrogen into

Helium
Water
Carbon
Plutonium

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Physics
Light travels slowest in

Glass
Water
Air
Vacuum

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Physics
The phenomenon of change in direction of light when it passes from one medium to another is called

Propagation
Dispersion
Refraction
Reflection

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Physics
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:

Intense sunlight at noon
The heating effect of current alone
Both the heating effect of current and hysteresis loss
Hysteresis loss alone

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Physics
Which colour has the highest frequency?

Violet
Indigo
Red
Green

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Physics
Number of lattices in the orthorhombic system is

8
5
7
4

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