Unformatted text preview: part b. Question #4 (5 points): The position of an electron is determined to within 1 angstrom. What is the minimum uncertainty in its momentum? Question #5 (10 points): (a) If your Fermi level is at E c , what is the probability of finding an electron at E = E c + kT? (b) If your Fermi level is at E v , what is the probability of finding a hole at E = E v – kT? Question #6 (5 points): You dope intrinsic silicon with Arsenic at 10 17 atoms/cm 3 . (a) What is the concentration of electron charge carriers at room temperature? (b) What is the concentration of holes?...
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 Spring '09
 A
 Electron, Electric charge, Fundamental physics concepts, Condensed matter physics, Fermi Function

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