"Series and Parallel" Current and Circuit PPT Download

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"Series and Parallel" Current and Circuit PPT Download

Part One: Interpretation of Important and Difficult Points

Comparison of series circuits and parallel circuits

[Example] There is a string of holiday lanterns where the filament of a certain bulb burns out, causing the entire string of lanterns to fail to work. Because the glass wall of the fairy lantern is coated with paint, it is impossible to directly identify the bulb of the beaker. Can you find a way to find the burned out light bulb? Tell me what you do and give it a try.

[Analysis] The wires can be connected in parallel with each small lantern in turn, and then judged based on whether the small lantern emits light.

Answer: Connect a wire to both ends of each small lantern in parallel. When the wire is connected to both ends of a small lantern in parallel and other lanterns emit light, the small lantern connected in parallel with the wire is burned out. .

Series and parallel PPT, part 2: in-class refinement

Knowledge point 1: Series and parallel connection

1. In the circuit as shown in the figure, the connection method of the two lamps L1 and L2 is ____. If L2 is removed from the lamp holder, L1 ____ (optional "lighting" or "extinguishing").

2. As shown in the picture, before the car turns, the driver will move the steering crossbar, and the front and rear turn signals on the same side of the car will flash and go out at the same time. However, when one of them is damaged, the other one can still work normally. The connection mode of the two turn signals in the circuit is ____, and the steering column is equivalent to ____ in the circuit.

3. As shown in the picture, which of the following statements is incorrect ( )

A. Bulbs L1 and L2 are connected in series

B． The switch only controls bulb L1

C. Switch controls light bulbs L1 and L2

D． When the switch moves from point a to point b, its control function remains unchanged.

Knowledge point 2: Connect series circuits and parallel circuits

4. In the circuit shown in the figure, the switch can control two light bulbs ( )

A. ①②　B． ①③

C. ②③　D. ②④

5. The circuit diagram in the picture corresponds to the actual diagram ( )

6. In the circuit shown in the figure, if the switches S1 and S3 are closed and S2 is opened at the same time, the lamps L1 and L2 are ____ connected; to make the lamps L1 and L2 form a series circuit, just close the switch ____.

7. The picture shown is a simplified circuit of a hair dryer that can blow both cold and hot air. A in the picture is the hair dryer and B is the heating wire. Insert the plug into the socket. If only switch S1 is closed, the hair dryer will blow out ____ wind; if both switches S1 and S2 are closed, the hair dryer will blow out ____ wind. (Fill in both "hot" or "cold")

8. As shown in the figure, when the switch S is closed, the connection between the lamps L1 and L2 is ____; when the switch S is opened, the phenomenon that will occur is ____________; the improper circuit connection is ____________________.

9. In the circuit as shown in the figure, to make the light bulbs L1 and L2 form a series circuit, it should be ( )

A. Only close S1

B． Only close S2

C. Close S1 and S2 simultaneously

D． Close S1 and S3 simultaneously

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For more information about the "Current and Circuit Series and Parallel Connection" PPT courseware, please click the Current and Circuit ppt Series and Parallel Connection ppt tag.

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Update Time: 2024-09-28

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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