Physics
In a conductor

The forbidden energy gap is very narrow
The forbidden energy gap is very wide
The valence band and the conduction band overlap each other
There is no conduction band

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Physics
Which of the following options correctly explains the term heat budget?

It is the balance between incoming and outgoing radiation
It is the amount of heat which the surface of earth receives from the sun.
It is a mode of transfer of heat through matter by molecular activity.
It is the radiation from the earth in the form of long waves.

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