Intrinsic - one mode OF
è semiconductor Material in its extremely pure form
1. Distinguish between intrinsic and extrinsic semiconductors
Extrinsic semiconductors
ma small admixture
of trinaces.
pertavolienti atons.
2. With the aid of a labelled diagram, describe the formation of an N-type
semiconductor
Oy
(4mks)
(6mks)
3. With the aid of a labelled diagram, difierentiate between the following terms as
applied in semiconductors
i) valence band
ii) conduction band
(4mks)
4. With reference to semiconductors, define the following terms;
1. Doping
ii. Valence electrons
(4mks)
5. With the aid of a labelled diagram, Explain the formation of P-type semiconductor.
(6mks)
6. Draw the symbols of the following diodes;
1. Zener diode
LED
910
Photo diode and
LED​