Why does the fermi energy level in an n-type semi conductor shift towards the conduction band?

An n-type semi- conductor is

The band structure in n - type semiconductor is

Value of forbidden energy gap for semi conductor is:

Assertion : The electrons in the conduction band have higher energy than those in the valence band of a semiconductor Reason : The conduction band lies above the energy gap and valence band lies below the energy gap.

in an n-type semiconductor, the donor energy level lies (a) at the center of the energy gap (b) just below the conduction band (c)just above the valence band (d) in the conduction band

Which of the following statements is true for an n-type semi-comductor?

A doped semiconductor has impurity levels 30meV bleow the conduction band,(a)Is the material m-type or p-type? (b)In a thermal collision,and amount kT of energy is given to the extra electron loosely bound to the impurity ion and this electron is just able to jump into the conduction band. Calculate the temperature T.

Which of the following energy band diagrams shows the N -type semiconductor?

Define the terms (i) F-centres (ii) n-type semi-conductors (iii) Ferrimagnetism.