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Version 09/22/05
EE 40 Homework Feedback from Readers in PDF Fall 05
HW 2
statistics: Mean: 8.23 Std Dev: 2.44
Grading Rubric (points given are all or nothing unless specified) Not including units was -0.2 1. a. 0.3 b. 0.8 c. 0.3 d. 0.8 e. 0.8 (-0.2 for incorrect values or not showing conservatio) (-0.4 if absorbed and delivered are switched)
2a) 1 point for each, all or nothing
2.3 a-e. 0.8 For parts c. and d. many people did not simplify, -0.4 depending on how far you simplified. Be sure to 1) plug in all values, try to have no common terms, e.g. 1Rv + 5Rv, as well as no fractions in the numerator or denominator.
Another problem, but students were not marked off for this. The answer to c and d. was Vm = (5k*R /(6k*R + 5k * 1k)) * Vin
Many students put 5*R / (6*R + 5) This can be very confusing when you plug in for R, you don't know whether to plug in kOhms, MOhms, or Ohms, etc. In the correct answer, it's very clear that we need to plug in kOhms for R, otherwise the units in the denominator will not match.
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