Which of the following statements are reasons that a material is a good electric

Question

Which of the following statements are reasons that a material is a good electrical conductor. True/False

There is an energy gap between the valence band and the conduction band, but it is only a few eV wide.
There is an energy band gap, but the Fermi energy is well within an unfilled energy band.
Because there are no gaps in the energy bands of the material.
The Fermi energy is in the middle of an energy gap that is more than 3 eV wide.
There is a small (1 eV) energy gap between the filled valence band and the next higher band where electrons can exist.

Explanation / Answer

Because there are no gaps in the energy bands of the material is the true statement as the valence and conduction band in a good conductor overlap each other

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