PHYS 205 Exam tips for both midterm and
final questions and answers Physics for
Scientists and Engineers II Athabasca
University
, Exam 1
Engineering Physics II
Please work all questions and problems (including sketches and scratchwork) in your “blue
book”.
To receive full credit: (1) where appropriate, show your work (sketches + equations + algebra +
numbers); and/or (2) where appropriate, illustrate or annotate your thought process in some
way. But, be brief! (You need not use full sentences, etc.)
You need not carry units through your calculations, but you do need to tack appropriate units
onto your final answers, where necessary (i.e. for numeric answers).
For problems requiring symbolic answers in terms of specific variables, you may of course
include in your answer any necessary constants, numbers, and/or symbolic representations of
exact numbers. (For example: εo, e, me, 7, ln(7), e7, etc.)
Questions (5 points each)
Q1 – List and briefly describe the steps/elements of the scientific process/method.
Q2 – How do we know charge exists? How do we know charge comes in two “flavors”? How
do we know charges exert forces on one another? (Hint: the answer to all three questions is
essentially the same.)
Q3 – In the following figure, what is the direction of the net electric force on the middle
charge? (Show how you got your answer.)
r 3r
+q +q +3q
Q4 – In words, state Gauss’ Law. What is it typically used for?
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