Date 
Question 
Answer 
March 10 
On problem 3, is the region supposed to be an equilateral triangle?

Yes

March 13 
Problem 1

The question about potential V should be the last thing in the problem. You should integrate the charge density in the case where the planes are grounded.

May 19 
For problem 3 a), is it considered sufficient to
determine the general relationship for the cutoff frequency?
Or is it necessary to write down expressions for the ALL of the field
components?

For part (a), yes. But note that you are asked for all the field
components in part (c).

May 21 
Problem 1. What do you mean when you say to not ignore the effect of the square?

You should take a/b << 1 but not equal to zero. That is, you must have at least one term in your answer containing a.
