2015-08-21
316
Read the text “The Movement of Holes”. Mark the following sentences as true (T) or false (F).
1. In figure 1 of exercise 2 we see that one covalent bond has broken, one electron has freed itself, and a hole has disappeared at point A.
2. The movement of electrons and holes is random.
3. A great number of electrons have freed themselves.
4. The hole has changed its position.
5. Conduction may take place in a pure semiconductor.
6. If some voltage is applied, the electrons begin to move in one direction and the holes begin to move in the opposite direction.
7. The increase of temperature of the semiconductor doesn’t increase its conductivity.
