1. Circuit Introduction Section 1:
Warm-up: Describe everything you know about circuits.

2. Activity: Parts of a Circuit: 1) 2) 3)
Materials Needed: Battery, two light bulbs, Led and two wires
Objective: Try to get one light bulb to light.
Parts of a Circuit: 1) 2) 3)

3. Parts of an Electrical Circuit:

4. Two types of Circuits Series Circuit: Electrons flow on one path only.
Parallel Circuit: Electrons can take two or more optional paths

5. Voltage, Current & Resistance
Voltage (V) : Current (I) : Resistance (R): Power (P):

6. Types of Electric Current (demos: Christmas lights)
Alternating Current (AC)
Direct Current (DC)
Definition: Comes From:
Definition: Comes from:

7. Activity: Finding Resistance
Voltage (V)
Current (Amps)
1.5 3
4.5 6
Voltage Vs Current
Materials:
3 D cell batteries
Alligator wire
Light bulb

8. Power Equation:
Ohm’s Law:
1) Current in circuit: 2) Power consumed:
The following battery has a voltage of 1.5 volts and is connected to a light bulb that has a resistance of 20 Ω. Find the following

9. More Sample Problems: Find the resistance in the light bulb.
With this resistance, how much voltage would have to be applied to reach .1 amps.
Find the power produced from the circuit.

10. Circuit Parts Resistors: Slow the flow of current
Diodes: Only allow the current to flow in one direction.
Light Emitting Diodes (LED): Only allow the flow of current in one direction and produce light.

11. Reading Resistors:

12. Resistor Practice Problems
__ __ x 10 ___

13. Reading Resistors Mini Activity Objective: Write out the resistor color code on the picture and then record its resistance. (Do in notes)
Calc:____________
Measured:________
Resistor 1:
Resistor 2:
Resistor 3:
Resistor 4:
Calc:____________
Measured:________
Calc:____________
Measured:________
Calc:____________
Measured:________

14. Schematic Diagram Symbols

16. Using the Multimeter Quiz
1) Find the voltage for:
Battery:__________
Resistor:_________
2) Find the current through the resistor:_________
3) Find the resistances:
Measured resistance:________
Calculated Resistance:_______

17. Class work and Homework
Pg 615 (1-6)
Pg 621 (1-5)