PCS 224 Midterm: PCS224 - F2014 Midterm (Solution)
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Student number: _____________________ student section #: _______________ (check your bubble sheet for section #) Midterm test oct. 29, 2014: duration of the exam: 120 minutes, this is a closed book exam; pens, pencils, erasers, calculators and your ryerson id are the only allowed items on your desk. Please sign here indicating you have read and understood the above instructions. Do not open the exam until you are told to do so. Then, before you start writing, verify that you do have all 11 pages without including the formula sheets (otherwise inform one of the invigilators). You can separate the formula sheets from the booklet. The total mark of the test is 100 points. The weight of each multiple-choice question is 4 points: a silicon crystal at t= 300k is doped with nd= 5. 0x1017 cm-3. Its fermi energy level is the middle of the energy gap.
