1. R Ch 35 Electric Circuits pg 1 Text RQ pg 559 RQ 3, 5, 7-9, 11-15

2. R Ch 35 A Battery & a Bulb pg 2 For electrical things to operate there must be a complete path or circuit.

3. R Ch 35 Electrical Circuits pg 3 Closed circuit = an operating circuit Open circuit = a circuit which is not operating There are two kinds of circuits; 1) series circuits have a single path for the electrons to follow 2) parallel circuits have multiple paths for the electrons to follow

4. R Ch 35 Series Circuits pg 4 Series circuits have a single path for the electrons to follow. Series circuits are only used in cheap xmas lights because a single break in the circuit kills the whole circuit

5. R Ch 35 Parallel Circuits pg 5 Parallel circuits have multiple paths for the electrons to follow, so any one device can be turned off or on and not effect the rest of the circuit

6. R Ch 35 Schematic Diagrams pg 6 Schematic Diagrams are the blueprints or picture of the circuit that is drawn before the circuit is built. Schematic Diagrams have standard symbols for the different parts of the circuit

7. R Ch 35 Combing Resistors in a Compound Circuit pg 7 Circuit load = the total resistance of a circuit

8. R Ch 35 Parallel Circuits & Overloading pg 8 When more & pathways are added to a parallel circuit the resistance gets lower & lower. (think about adding more hoses to a pipe, more water would come out) So when too many xmas lights are plugged into a socket the danger exists of overheating the wires and causing a circuit overload or electrical short

9. R Ch 35 Parallel Circuits & Overloading pg 9 There are three ways to prevent overloads; 1) Fuse – one time use device that melts a metal strip sealed in glass, found in cars 2) circuit breaker – a reusable switch found in most homes 3)GFI – ground fault interrupt, a reusable switch found near water like bathroom sink