Updated:  9/9/04
                  
           Chapter 19 DC Circuits

          A. Instruction to students:
                 Homework:
                    1)  Read carefully all sections except Sections 19-3, 19-4, 19-5, 19-9, and 19-11.
                    2)  Do all examples in the text, except 19-8, -10, -12, -13 and -14.
                    3)  Do all sample multiple choice problems posted.
 
                Following formula and constants from Chapters 19 will be given during the exams.
                Practice how to use and apply them.  Careful with the inverse algebra!
                                         R = R1+R2+R3
                                         1/R = 1/R1+1/R2+1/R3
                                         V = EMF - I r
                                         C = C1+C2+C3
                                          1/C = 1/C1+1/C2+1/C3

               Note that the five experiments, E1- E5, in 100BL are directly related to the materials
                in this Chapter.  You are required to understand Sections 19-7 and -10 but not
                responsible for the calculations discussed in the examples in these sections.  
                Calculations similar to them should be discussed in 100BL   
                                      
          B. Biomedical (and technological) application:
                     Heart pacemakers, Section 19-8,   pp572-573.. 

 
          C. Lectures and study guideline
 
                PRACTICE APPLICATIONS OF OHM'S LAW!!!!!!!

          Resistors in series and in parallel (pp556-561)
          This section forms the main part of this Chapter.  Go through Section 19-1 in the text very,
          very carefully, and DO the examples in the section.  Make sure to understand the
          DERIVATION of  the formula
                                          R = R1+R2+R3                in series
                                         1/R = 1/R1+1/R2+1/R3      in parallel
          because the derivation itself is a good application of Ohm's law!
          For example, the following ideas are used in the derivation: when resistors are connected in
          series, the total V is equal to the sum of voltages across each registor, and the current going
          through each registor is the same (why?)   When registors are connected in parallel, the total
          I is equal to the sum of currents going through each registor, and the volage across each
          registor is the same (again, why?)
          (Example 19-1, -2, -3, -4, -5, and -6.)

           EMF and terminal voltage (V)  (pp562-563)
                              V = EMF -I r
           This is again an application of Ohm's law.  Go over Example 19-7 step-by-step.
           
           Capacitance in series and in parallel (pp568-570)
           As in the case of registors, follow the derivation of the formula 
                                         C = C1+C2+C3
                                          1/C = 1/C1+1/C2+1/C3
           very, very carefully.  Because the derivation is a good application of Q=CV, you should
           undertand it.
           (Example 19-9)