"Understanding Circuits" Simple Circuit PPT Courseware 6

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"Understanding Circuits" Simple Circuit PPT Courseware 6

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Circuit composition

Power supply A device that can provide _____ to electrical appliances

Electrical appliances are devices that use _____ to work and convert _____ energy into _____ energy.

switch A device in an electrical circuit that controls the circuit _____

Wires are used to _____ circuits and transmit electrical energy

circuit status

Path Path refers to a circuit of _____. Its characteristic is that there are _____ in the circuit and the electrical appliances can work.

Open circuit Open circuit refers to a _____ circuit somewhere, also called an open circuit. Its characteristic is that there is no _____ in the circuit, and the electrical appliance cannot work.

A short circuit refers to a circuit that directly connects the two poles of _____ with a wire without going through _____

Circuit diagram uses prescribed ______ to represent the components in the circuit. By connecting these symbols with line segments representing wires, a circuit composed of physical objects can be represented. This kind of diagram is called ______

Basic requirements for drawing circuit diagrams

Use uniformly prescribed ______; try to avoid wiring ______; make wiring ______, and try to keep the circuit diagram simple and beautiful

1. Method of drawing circuit diagram based on the actual object

Drawing a circuit diagram is to summarize the problem and make it concise and clear. It is a method of studying the problem. When drawing a circuit diagram, you must draw it based on the actual object: (1) Start with the power supply, clarify the location and sequence of each component, and there are several routes; (2) Pay attention to the locations of separated points and converging points; (3) When drawing a circuit diagram, you must use the prescribed component symbols and match the component locations in the physical connection diagram, and do not reverse the order; (4) Draw a circuit diagram horizontally and vertically.

2. Method of connecting the physical diagram according to the circuit diagram

Connecting the physical diagram or drawing the circuit diagram belongs to circuit design. Whether you draw the circuit diagram from the physical object or the physical diagram from the circuit, you should first clarify the path of the current. When connecting the physical diagram according to the circuit diagram, you can start from the positive pole of the power supply and follow the direction of the current to the negative pole of the power supply. The order of the components in the connected physical diagram should be consistent with the circuit diagram. You can also start from the negative pole of the power supply and end at the positive pole of the power supply.

[Example] Draw its circuit diagram according to the physical drawing as shown in the figure.

Analysis: The circuit diagram should completely reflect the composition of the circuit. Pay special attention to the polarity of the power supply and whether the wires are connected when they cross. These component symbols should be distributed as evenly as possible in the circuit diagram to make the circuit diagram clear and beautiful. The entire circuit diagram should be rectangular, with wires drawn straightly. The connections between wires and components should be symmetrical and cannot be disconnected, making the circuit diagram simple and neat. First, start from the positive terminal of the power supply and follow the direction of the current to point B. The current is divided into two paths at B, one path returns to the negative terminal of the power supply through L1; the other path passes through L2, and then returns to the negative terminal of the power supply through the switch. Based on the above analysis, just use the prescribed symbols to draw the circuit diagram. Remember not to miss the letter symbols of each component. The order of the components in the circuit diagram should be consistent with the actual diagram.

1. Which of the following is not a power supply ()

A.Generator B.Battery

C. Dry battery D. Electric motor

2. Which of the following is not a component of a simple circuit ()

A. Wire B. Switch

C. Electrical appliances D. Physics textbooks

3. Which of the following statements is correct ()

A. Connect electrical appliances and switches with wires to form a circuit.

B. Dry batteries, generators, and electric fans are all power sources

C. When connecting the power supply to the circuit, there is no need to consider the positive and negative poles.

D. The switch should be open when connected to the circuit

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For more information about the PPT courseware "Simple Circuits to Understand Circuits", please click the Simple Circuits ppt to Understand Circuits ppt tag.

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Update Time: 2024-11-22

This template belongs to Physics courseware Beijing Normal University Ninth Grade Physics Volume 1 industry PPT template

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