Physics 217 - Fall 1998

Electricity and Magnetism I

Problem Set #6

Due: Thursday, October 15, 1998

Griffiths problems:

1)	2.26	[10 pts]
2)	2.31b	[5 pts]
3)	2.32	[5 pts]
4)	2.33	[10 pts]
5)	2.36	[10 pts]
6)	2.40	[10 pts]
7)	2.49	[10 pts]

Problem 2.49 is quite difficult, but it explains the very interesting physics of vacuum tubes. It is a real problem of electrostatics in action!

Hints: For part (b), use energy conservation to get the answer. For part (e), guess a solution of the form V(x)=Cx^a, and substitute in to determine the exponent "a".

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