"Series and Parallel Connection" Current and Circuit PPT Courseware Download

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"Series and Parallel Connection" Current and Circuit PPT Courseware Download

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Series and parallel connection

1. As shown in the circuit diagrams of Figures A and B, Figure A is a series circuit and Figure B is a parallel circuit.

Knowledge point 2: Connect series circuits and parallel circuits

2. In a series circuit, if one bulb in the circuit is broken, the other bulbs will not work properly; in a parallel circuit, if one bulb in the circuit is broken, the other bulbs will (please fill in "can" or "can't") normally. Work.

3. As shown in the figure, if L1 and L2 are connected in series, connect terminals C and B; if lights L1 and L2 are connected in parallel, after terminals C and D are connected, terminal A must be connected to terminal B.

4. In the circuit shown in the figure, the switch can control two lights at the same time, and the two lights are connected in parallel (D)

Knowledge point 3: Circuits in life

5. The shower head in the bathroom can spray hot and cold water according to demand. The water path of the hot water pipe and cold water pipe in the shower head is similar to the branch (optional "stem" or "branch") path in the circuit. The infrared light on the top of the bathroom The connection method between the two lamp tubes on the bathroom heater is parallel (optional "series" or "parallel").

6. The street lights on the road always turn on and off at the same time. If the filament of one of their lamps breaks, the other lamps will still glow normally. Based on these phenomena, determine whether the street light is (B)

A. in series

B. Parallel connection

C. It may be connected in series or in parallel.

D. Unable to determine what kind of connection method it is

7. In the circuit as shown in the figure, to connect small bulbs L1 and L2 in series, switch S2 must be closed. To connect L1 and L2 in parallel, switches S1 and S3 must be closed. If switches S2 and S3 are closed, the circuit will be short-circuited.

8. Open the door of the refrigerator compartment, and the light inside will light up. At this time, the motor of the refrigeration compressor is not working, because the motor of the compressor is controlled by the temperature control switch. Part of the circuit of the refrigerator is shown in the figure. In the picture, L is the lighting in the refrigerator, and M is the motor for the compressor. When switches S1 and S2 are both closed, the connection mode of L and M is parallel. Among S1 and S2, the temperature control switch is S1.

Series and parallel PPT, part 2: improvement of comprehensive capabilities

9. The following is the judgment made by Xiaoqiang after observing and analyzing some circuit connections around him. The wrong one is (B)

A. The range hood in the kitchen is equipped with lights and motors. Sometimes they work at the same time, and sometimes only the motor works alone. They are connected in parallel.

B. One switch can control two lights, and the two lights must be connected in series.

C. The lighting and other electrical appliances installed in the home do not affect each other when used. They are connected in parallel.

D. There is a switch in each of the two brake handles of the electric bicycle. When braking with either handle while driving, the switch on the handle is immediately disconnected and the motor stops working, so the two switches in the handle are connected in series with the motor.

10. (Quzhou High School Entrance Examination) The fingerprint lock is a high-tech product that integrates multiple technologies such as optics, electronic computers, and precision machinery. Its "key" is a specific person's fingerprint (S1), magnetic card (S2) or emergency key Key (S3), all three can independently make the motor M work and open the door lock. Which of the following circuit designs meets the requirements (B)

11. (Tianmen High School Entrance Examination) Modern society advocates civilized travel. When passing a traffic intersection, you must abide by the rules of "stop on red light, go on green light, yellow light, etc.". Four students in a certain study group observed the traffic lights at the intersection and discovered that the red light , green light and yellow light can work independently. They designed the circuit diagram as shown in the figure respectively, the correct one is (A)

12. In the circuit shown in the figure, which of the following judgments is wrong (C)

A. When switches S1 and S3 are closed and switch S2 is opened, lamps L1 and L2 are connected in parallel.

B. When switch S2 is closed and switches S1 and S3 are opened, lamps L1 and L2 are connected in series.

C. When switches S1 and S2 are closed and switch S3 is opened, the light L1 is on but L2 is off.

D. When switches S1, S2, and S3 are closed at the same time, the power supply is short-circuited.

Series and parallel PPT, Part 3: Expand, explore and improve

15. As shown in the picture, there are three identical wires threaded in a hard plastic pipe spanning both sides of the river. In order to identify which two wire ends are the two ends of the same wire, you can use the tester as shown in the figure to test. The operation process is as follows:

(1) Connect A and B with wires, and connect m of the pass tester to D. When n is connected to E, the small bulb emits light. When n is connected to F, the small bulb does not emit light. From this, it can be determined that C and F (fill in the letters) are two ends of the same wire;

(2) In order to identify the two ends of the other two wires, you can connect A and C. When one end of the tester must be connected to F (fill in the letter), the other end only needs to touch one wire to identify the two wires. open. Please briefly describe the identification method.

The other end of the pass tester is connected to D. If the light is on, AD is the same wire and BE is the same wire; if the light is not on, BD is the same wire and AE is the same wire.

Keywords: Free download of PPT courseware for ninth-grade physics from the People's Education Press, download of series and parallel PPT, download of current and circuit PPT, .PPT format;

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: 2024-10-01

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