Help with electromag questions

[midas_touch]

Hi, this is my first post in these forums. I'm a second year undergrad student that is currently undertaking a subject in Electromagnetism and I'm having troubles with some questions for an asignment im doing now. Any help/assistance with the questions that I've posted below will be much appreciated. Thanks.

Edward.

http://img261.imageshack.us/img261/1219/electromag1mk3.jpg

http://img528.imageshack.us/img528/3104/electromag2nb4.jpg

[Redbelly98]

Welcome to PF!

What have you attempted so far? We don't give out help unless you try first.