This is where you'll find information about the tests.

For Test 1: On problem 2, that's an inner radius of a, outer radius of b. On problem 1, if you get the trick, you don't have to do an integral. The moment of inertia is the sum over each little bit of mass, times the square of that bit's distance from the axis of rotation.

Solutions for test 1 (1 copy) are in the classroom. Solutions: prob 1 & 2 , prob 3, prob 4, prob 5&6, prob 7.

For test 2: In response to the most popular questions: Yes, you will come up with two separate equations for the current density in problem 4, and the electric field is constant in time. Yes, I did mean to type 37 degrees north, but go ahead and work the problem as typed. One hint many have needed for problem 1 is: Product Rule! And, in problem 2, yes, a and b are constants.

Test 2 solutions: Problems 1&2 , 3&4, and 5.

Test 3 solutions: Problems 1&2, the rest.

Sample questions for the final can be found here.

Corrections, etc., for the final: On problem 1, of course E is the real part of that expression; this really makes little difference in your calculations. YIKES!!! Guys, there's a sad typo on problem 3. The x component of F is supposed to be 2x and the y component of F is supposed to be 3y. On problem 8, note that you're taking a step of length s; your answer will not be independent of (x,y,z).

Solutions for the final exam: Problem 1, 1&2, 3&4, 4&5&6&7, 8&9. What's that? You don't remember what the final looked like? Check this out.