Fill in the gaps in the sentences.

Date: 2015-10-07; view: 567.

Read the text “The P-N Junction”. Mark the following sentences as true (T) or false (F).

8. Diffusion is a tendency of charge carriers to move to areas of high density.

9. The free electrons and holes have completely purposeful motions in the lattice.

10. On average the N-type region gains holes and loses electrons and the P-type region gains electrons and loses holes.

11. The region to the left of the junction becomes positively charged and the region to the right of the junction becomes negatively charged.

12. If a silicon crystal is doped with donor atoms at one end and with acceptor atoms at the other end, the crystal will have only N-type regions.

13. In Fig.2 from the text the plane AB is the P-N junction.

14. A hole passing into the N-type region, or an electron passing into the P-type region, becomes a majority charge carrier.

1. In the N-type region electrons are in … and in the P-type region holes … .

2. Since the N-type region loses … and gains … and the P-type region loses … and gains …, the region to the left of the junction becomes … and the region to the right of the junction becomes … .

3. If a silicon crystal is doped with … at one end and with … at the other end, the crystal will have both … and there will be … between them.

4. In both regions the probability of a minority charge carrier meeting and recombining with a majority charge carrier is … and the minority charge carrier lifetime is … .

5. The movement of holes and electrons across the junction … current and this is known as … .