Tag: energy bands
Questions Related to energy bands
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to $(E _g) _C,\, (E _g) _{Si}$ and $(E _g) _{Ge}$.Which of the following statements is true?
The band gap is larger for which of the following
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than $2480\ nm$ is incident on it. The band gap in $(eV)$ for the semiconductor is.
The difference between the highest energy in a band and lowest energy in the next higher band is called the band gap between the two energy bands.
In extrinsic semiconductors :
Among the following, the wrong statement in the case of semiconductor is:
At absolute zero, Si acts as
What is the resistivity of a pure semiconductor at absolute zero ?
Which one is the weakest type of bonding in solids ?
The intrinsic semi conductor becomes an insulator at