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.