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Physics

Physics
In beta decay what is emitted

All of these
Neutron
Proton
Electron

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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:

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

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Physics
Pieces of camphor placed on water move about rapidly. This is because of

Viscosity
Capillarity
Surface tension
Diffusion

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Physics
When a person sitting on a swing stands up on the swing, the frequency of oscillation

Decreases
Increases
Does not change
Becomes infinite

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Physics
Metals are good conductors of electricity because:

They have high melting point.
All of these
The atoms are lightly packed.
They contain free electrons.

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Physics
The metal used to make lightning conductors is

Aluminium
Iron
Zinc
Copper

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MORE MCQ ON Physics

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