1. Building Circuits

2. Why are some Christmas lights more expensive than others?

3. Series vs. Parallel Circuits Series circuit have only one path – I T = I 1 = I 2 = I 3 … – V T = V 1 + V 2 + V 3 … – R T = R 1 + R 2 + R 3 … Parallel circuits have more than one path – I T = I 1 + I 2 + I 3 … – V T = V 1 = V 2 = V 3 … – 1/R T = 1/R 1 + 1/R 2 + 1/R 3 …

5. Loads in Series More loads = more resistance

6. Loads in Parallel Current will divide and junction points

7. Measuring Voltage Voltmeter Connected in parallel Measuring voltage across resistance – Require two points

8. Measuring Amperes Ammeter Connected in series Measuring current passing through resistance

9. Circuit Diagrams Drawing of circuit using symbols

10. Homework Page 450 # 1, 3, 4 Page 453 # 1-5 Page 457 # 2,3, 5, 6