1. PHY 2049: A review 21. Coulomb’s law. 22. Electric fields, vector superposition. 23. Gauss’ law, E due to various charge distributions 24. Electric Potential, superposition 25. Capacitors 26. Current and Resistance 27. Circuits

2. Tips The exam will be held here during the usual class hours (12:30-2:00PM) on Monday June 6, 2011. You are allowed a calculator, a #2 pencil and erasor and a single page formula sheet. The sheet must contain only formula. Please bring your student ID. Do not wear a hat in class during an exam. Please do not use any electronic communication during the exam. At this time, practice old exams.

3. Question Four identical light bulbs A, B, C and D are connected in series to a constant voltage source. A wire is then connected across B. What is the brightness of A relative to its former brightness? (1) 0.44 (2) 0.56 (3) 1.78 (4) 2.25 (5) none of these

4. Two isolated conducting spheres are separated by a large distance. Sphere 1 has a radius of R and an initial charge 2Q while sphere 2 has a radius of 3R and an initial charge 8Q. A very thin copper wire is now connected to the spheres. Charge flows between the spheres until they reach the same electrical potential. How much charge will be transferred from sphere 2 to sphere 1? (Note that the charge transferred can be positive, negative or zero.) (1) Q/2 (2) 2Q (3) –Q/3 (4) -3Q (5) None of these

5. A Formula sheet