NUS PC1432 (AY11/12 SEM 2) FINAL EXAM SUGGESTED SOLUTIONS

I don't have time to draw any nice diagrams so you may have to spend some time reading my long answers. Hopefully, I don't have too many typos. Just leave a comment if you have found one and alert me if you think I am talking rubbish anywhere in the solution. Anyway, the examination paper can be obtained from http://libportal.nus.edu.sg/frontend/index. =)

(Disclaimer: The author has tried his best to ensure the quality of the solution. However, the author will not responsible for any liabilities that arise directly or indirectly from the usage of these solutions.)

Part I Question 5: http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/michel.html.

Arriving at the relationship between the electric field and the surface charge density: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesht.html. A more rigorous way of arriving at the magnitude of the attractive force: http://www.schoolphysics.co.uk (Example 9.4).

Part II Question 8(a): Several variants of the question: http://www.ece.ucdavis.edu/~lxgliu/eec130a/2012winter/hw9s.pdf (see Problem 5.40).

Part II Question 9(d): http://panda.unm.edu (see bottom of Page 4)