Pathfinders. How can 1 wire, 1 battery, and 1 bulb be used to make a complete circuit? What about 2 wires, 1 battery, and 1 bulb?

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2 Pathfinders How can 1 wire, 1 battery, and 1 bulb be used to make a complete circuit? What about 2 wires, 1 battery, and 1 bulb?

3 Circuit Diagram For the device to work, the electrical energy must flow in a complete or closed circuit.

4 Basic Circuits Basic circuits require the following components: An energy source (electricity or a dry cell) A conductor (usually a wire or something made of metal) A device to operate (resistor)

5 Would This Work?

6 Would This Work?

7 Would This Work?

8 Would This Work?

9 Would This Work?

10 The Central Concept: Closed Circuit

11 Open and Closed (Complete) Circuits

12 Closed Circuit Complete Circuit Open Circuit

13 Switches

14 Duracell Duracell Series

15 Duracell Duracell Series

16 Duracell Duracell Series

17 Duracell Duracell Series

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19 Series Circuits (L) Connect 1 bulb to your batteries Draw a diagram and write one sentence describing what happened. Connect a total of 2 bulbs to your batteries Draw a diagram and write one sentence describing what happened. Connect a total of 3 bulbs to your batteries Draw a diagram and write one sentence describing what happened.

20 Stop and Think What happened as you added more bulbs to your series circuit? Why do you suppose that is? How many paths does the electrical current have to flow through?

21 Removing a Bulb What do you think would happen if we removed a bulb from a series circuit? 1. Set up a series circuit with 1 bulb. 2. Now, come and pick up a bulb holder with the bulb removed. 3. What happened to the other bulb? 4. Why?

22 Duracell Duracell Series

23 Duracell Duracell Series

24 Series Circuits (R) Series circuits have one and only one path for an electrical current to flow through. The current flows through every part of the circuit. In a complete series circuit, the more bulbs or devices that are added, the. If one bulb is removed, then.

25 Series Circuit Examples Toys that use batteries Cell Phones Computers and Tablets Blenders Televisions Holiday Lights (old fashioned) Any others??

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27 Making Parallel Circuits Make a series circuit with 1 bulb Draw a diagram and write one sentence describing what happened.

28 Parallel Circuits (L) Make a series circuit with 1 bulb. Next, connect a total of 2 bulbs to your battery like this: Draw a diagram and write one sentence describing what happened.

29 Parallel Circuits (L) Now add a third bulb in your parallel circuit like this: Draw a diagram and write one sentence describing what happened.

30 Stop and Think What happened as you added more bulbs to your parallel circuit? Why do you suppose that is? How many paths does the electrical current have to flow through?

31 Removing a Bulb What do you think would happen if we removed a bulb from a parallel circuit? 1. Set up a parallel circuit with 2 bulbs. 2. Now, come and pick up a bulb holder with the bulb removed. Swap it out with one of the bulbs in your parallel circuit. 3. What happened to the other bulb? 4. Why?

32 Duracell Duracell Parallel

33 Duracell Duracell Parallel

34 Duracell Duracell Parallel

35 Duracell Duracell Parallel

36 Duracell Duracell Parallel

37 Duracell Duracell Parallel

38 Parallel Circuits (R) Parallel circuits have more than one path for an electrical current to flow through. Have at least one point where the current divides or splits into different branches. In a complete parallel circuit, the more bulbs or devices that are added, the. If one bulb is removed, then.

39 Parallel Circuit Examples School and business lighting and outlets Household lighting and outlets Electrical wiring in cars Microwave Refrigerator Holiday lighting (newer strands) Any others??

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41 Lights in a Series Circuit

42 Lights in a Parallel Circuit

43 Series and Parallel Circuits

44 Batteries in Series & Parallel

45 Comparison Definition Resistance Examples Series Circuit Only one path for current to flow Total resistance increases -Holiday lights (traditional) Parallel Circuit Multiple paths for current to flow Total resistance stays same -Household Current