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Unformatted text preview: Ans: ( ) ( ) type n cm p n n o i o − ⇒ = = = − 3 17 13 2 2 10 10 10 15 (b) Sketch the band diagram of the sample, cal culating and labeling the difference between the various energy levels ( E C , E V , E F , E i ). (3points) Ans: (c) Is the probability of finding an electron at the energy level E = E C closer to zero or one? (1 point) Ans: According to Fig. 315, the probability is closer to “zero”. 3. On the energy diagram shown below: (a) Among electrons (1), (3) and (4), which one or ones has the highest total energy? (2 points) Ans: According to the diagram, Electron (3) has the highest total energy. (b) Rank the electrons (1), (3), and (4) in descending order of their kinetic energy. (3 points) Ans: Electron (4), (3), (1) in descending order (1) (3) (4) (1') (3') (4') E F x 1 x 2 x 3 x 4 x 5 X E c E v E i E F E g E g /2 Total Electron Energy E Kinetic Energy...
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 Fall '09
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