# Good Luck! Exam 1 Review Phys 222 – Supplemental Instruction TUESDAY SESSION AS NORMAL – Q AND A THURSDAY SESSION CANCELLED TO ACCOMMODATE EXAM REVIEW.

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Good Luck! Exam 1 Review Phys 222 – Supplemental Instruction TUESDAY SESSION AS NORMAL – Q AND A THURSDAY SESSION CANCELLED TO ACCOMMODATE EXAM REVIEW

Exam Overview  About 1/3 of the problems will stress conceptual understanding  Don’t waste too much time on these  Think carefully!  Remaining 2/3 will be numerical problems to test ability to apply these concepts  Know your formula sheet  Rule out wrong answers  25 + 2 Questions, 2 hours (4.4 minutes/problem)

Prepare yourself  Practice Problems!!  Practice tests (11 of them, with solutions)  It’s really easy to think you understand a concept, but then find out you can’t solve a problem on it.  If you miss a problem, read the solution, then do it again later without the solution.  Old quizzes (make sure you understand mistakes)  Book problems (have answers in the back)  SI worksheets  Recitation problems  Concepts  Textbook  Online Summaries  Lecture Slides

Do you know all the following?

 Fluid Statics  Density, pressure  Buoyancy, surface tension  Archimedes' Principal  Fluid dynamics  Bernoulli’s equation  Pascal’s law, continuity equation  Laminar flow

 Electric Charge  Coulomb’s law  Charged objects’ behavior  Conductors, Insulators, Polarization  Electric Charge Interaction  Electric field, field lines  Dipoles, dipole moment  Flux  Integral Representation  Gaussian Representation  Applying Gaussian surfaces to objects

 Electric Potential  (vs) Electric Potential Energy  Equipotential Diagrams  Calculating potential at various points  Movement of charge in the presence of a potential.  Relation to other types of energy

 Capacitance  How various changes affect capacitance  What are their uses  Connections in circuits  Parallel vs series  Equivalent capacitance  Dielectric additions  Current  Relation to other concepts  Resistance  Connections, much like capacitors

Here we go! LOTS OF TEST PROBLEMS WITH TIPS SPRINKLED IN

Useful tip

Fluids!

Electric Force Electric Field Electric Potential Energy Electric Potential Difference (voltage) Divide by q Field descriptions: Do not depend on recipient particle/charge. Recipient charge -- q Forces and energy: Do depend on recipient and emanating charge. Emanating charge -- Q

Field lines!  Electric field lines go from + to -  Electric field lines end at negative charges.  Line density indicates field strength

Dipoles

Dipole Moment and Torque

Steps in solving GL Problems  Draw a picture.  Pick a good Gaussian surface. Symmetry!  Write expression of integral flux notation. (if E || A then, EA)  Write expression for Gauss’s Law involving enclosed charge.  Set the expressions equal and eliminate variables to solve.

Capacitance and Energy

Combining components Capacitors Resistors Addition T = X1 + X2 +… Inverse Addition 1/T = 1/X1 + 1/X2 +… Addition T = X1 + X2 +… Inverse Addition 1/T = 1/X1 + 1/X2 +… Parallel Series

Hodgepodge OF RELEVANT QUESTIONS

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