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PHY 142: Electricity & Magnetism (Honors)
Prof. S. Teitel stte@pas.rochester.edu  Fall 2009
Problem Set 2
Due Friday, September 18, by 2 pm in PHY 142 homework locker
 Problem 1 [10 points]
Purcell problem 1.9
Although we won't prove it until Tuesday, you can make use of the fact stated in the problem that the field outside a spherical distribution of charge is the same as if all the charge were at the center.
Use your results above to solve Purcell 1.10. What is physically wrong with the result you find?
 Problem 2 [10 points]
Purcell problem 1.15
You may have to wait for Tuesday's lecture to do this one.
 Problem 3 [5 points]
Purcell problem 1.16
 Problem 4 [5 points]
Purcell problem 1.17
 Problem 5 [10 points]
Purcell problem 1.18
You may have to wait for Tuesday's lecture to do this one.
 Problem 6 [10 points]
Purcell problem 1.20
You may have to wait for Tuesday's lecture to do this one.
The charge in this problem is located only on the surface of the cylinder.

