In the energy band diagram of insulators,the | vedclass

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(A) In insulators,the valence band is completely filled with electrons,and the conduction band is completely empty. The energy gap (forbidden energy g

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very high,empty.

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(A) In insulators,the valence band is completely filled with electrons,and the conduction band is completely empty. The energy gap (forbidden energy gap) between the valence band and the conduction band is very large (typically $> 3 \ eV$). Therefore,electrons cannot jump from the valence band to the conduction band even at room temperature,making them poor conductors of electricity. Thus,the band gap is very high and the conduction band is empty.

In the energy band diagram of insulators,the band gap and the conduction band are respectively:

Similar Questions

Consider the following statements regarding a semiconductor:
$(A)$ There are no free electrons at $0 \ K$.
$(B)$ There are no free electrons at any temperature.
$(C)$ The number of free electrons increases with temperature.
$(D)$ The number of free electrons is less than that in a conductor.

If the lattice constant of this semiconductor is decreased,then which of the following is correct?

If the lattice constant of this semiconductor decreases,which of the following is true?

If pieces of copper and germanium are cooled from room temperature to $77 \ K$,their resistance will:

In semiconductors at room temperature,

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