October 2009
Intermediate to advanced
503 pages
14h 28m
English
Content preview from Engineering Physics
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Solved Problems
1. Find the temperature at which there is 1% probability that a state with energy 0.5 eV above Fermi energy.
(Set-1, Set-3, Set-4–May 2007), (Set-1, Set-2, Set-3–Sept. 2006), (Set-2, Set-3–May 2006), (Set-1, Set-4–June 2005), (Set-1–May 2003)
Sol: Probability, f(E)= 1% = 1/100
E – EF = 0.5 eV
T = ?
Substituting the values, we get:
Taking ln on both sides, we get:
2. Fermi energy of copper is 7 eV at room temperature. ...
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