Question

The energy levels of holes are:
a) In the valence band
b) In the conduction band
c) In the band gap but close to valence band
d) In the band gap but close to conduction band​

Answer 1

c) In the band gap but close to valence band

Explanation:

A hole is the absence of an electron in a particular place in an atom. The hole current occurs at the valence level or dependent on the particular orbits.

It is the distance between two valence shell or energy level. The distance or gap is created by the electrons carried by the orbits because, same charge repels each other.

But rather than closer to the valence shell, it is closer to the nucleus because, the nucleus have a positive charge while the orbits have negative charge and as result due to having negative charge the orbits get attracted by the nucleus and at the same time they get deflected by the orbits due to having similar or negative charge and as result a gap is produced between two shells.

Generally it is considered between the gaps of two orbits closest to the nucleus, namely K and L because, here the effect of the nucleus or positive charge is more than the outer orbits.