1. A diamond structure is: a. Similar to a FCC structure b. Similar to two inter-penetrating FCC structure c. Part of the trigonal system d. Adopted by both silicon and germanium 2. A (100) plane is similar to a: a. (111) plane b. (010) plane c. (110) plane d. (200) plane 3. Find the maximum fraction of the unit cell volume, which can be filled by identical hard spheres in Germanium: а. 16% b. 52% с. 34% d. 74% 4. In an intrinsic semiconductor a. You have no charge carriers b. You do not have any dopant c. You have as many holes as electrons d. You have only internal dopants 5. When an electron goes from the valence band to the conduction band, the process is called: a. Drift b. Diffusion c. Recombination d. Generation

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