The energy required for an electron to jump the forbidden band for germanium at room temperature is $........... eV$.

Write the definition of valence band and conduction band.

The energy gap in semiconductors is of the order of ........ $eV$.

The effect of an increase in temperature on the number of electrons in the conduction band $(n_e)$ and the resistance of a semiconductor will be as follows:

In semiconductors at room temperature,

Carbon,Silicon,and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g)_C$,$(E_g)_{Si}$,and $(E_g)_{Ge}$ respectively. Which one of the following relationships is true in their case?