1. Series and Parallel

2.  a single resistance that can replace all the resistances in an electrical circuit while maintaining the same current when connected to the same source  symbol R total or R t

3.  by combining KVL, KCL and Ohm’s Law, the following rules can be derived:  for any number of resistors connected in series R t = R 1 + R 2 + R 3  for any number of resistor connected in parallel 1/R t = 1/R 1 + 1/R 2 +1/R 3

5.  Calculate the equivalent resistance in a series circuit containing the following resistances in series: 26 Ω, 11 Ω and 18 Ω.  55 Ω

7.  Calculate the equivalent resistance of a circuit with the following resistors in parallel: 5 Ω, 10 Ω and 30 Ω.  3 Ω

8.  Find the equivalent resistance in the circuits below:

9.  page 339 #4, 5  page 340 #7  page 342 #9