1
Winter 2008
Physics 6B
Guoqing Wu
Sample Exam for the second Midterm
Remarks:
1)
Review section is on Friday, Feb. 22 (68pm in the same classroom).
2)
The 2nd midterm exam is on Feb. 27 (Wednesday) in class (1 h).
It will cover chapters 14, 19 and
20 mainly
.
3)
The real exam will be similar to this sample, but much shorter
.
4)
In our exams, some original formula will be listed so that you can feel free to use.
How to prepare for exams:
a) Try to solve this sample exam without opening the textbook or note first.
b) If you cannot solve quickly (straightforwardly), it simply means that you are missing some points.
Thus you need read the lecture notes/example solutions or textbook chapters carefully.
c) If you have math problem (often you can not solve the problems because your background
knowledge/preparations in math is weak, like sin(
α

π
/2) =  cos
α
,
or cos(
α
+
π
/2) =  sin
α
,
or the corresponding derivatives, etc.), you need read the Appendix of the textbook/visit our 6B
class online pages.
d) Try to finish by the review session on Friday, Feb. 22.
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Please feel free to use the following formula without proof or derivation
.
(A similar sheet with the formula will be provided at the midterm #2)
Gauss’s Law:
0
ε
in
q
A
d
E
=
⋅
→
→
∫
Coulomb’s Law:
∧
→
=
r
r
q
q
F
2
2
1
0
4
1
πε
Electric field by a point charge:
∧
→
=
r
r
q
E
2
0
4
1
Electric potential difference:
→
→
⋅

=

=
Δ
∫
s
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 Winter '10
 GRUNER
 Physics, Capacitance, Electric Potential, Electric charge, R R R

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