"Series and Parallel Connection" Current and Circuit PPT Courseware

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"Series and Parallel Connection" Current and Circuit PPT Courseware

review

How many parts does a basic circuit consist of?

1. Commonly used circuit components

2. Symbols of several common circuit components

3. Draw the circuit diagram of the lamp operation based on the actual drawing.

think about it

In the circuit diagram we studied in the previous class, we only used one electrical appliance. However, in an actual circuit, there are often more than one electrical appliance, sometimes two, three or even more. So how do we connect them to the circuit?

draw a picture

Can students use these components to form a circuit to make both light bulbs glow? Please draw the circuit diagram first.

Circuit diagram:

This is the series circuit and parallel circuit we are going to study today. So, which one is a parallel circuit and which one is a series circuit?

Do it: Experimental Exploration: Characteristics of Series Circuits (Group Activity)

The position of the switch has changed. Has the control function of the switch changed?

Do working with electrical appliances interfere with each other?

What did the students discover through the experiment?

1 In a series circuit, as long as one part is disconnected, the entire circuit will fail. The function of the switch has nothing to do with its position

2 In a series circuit, electrical appliances interfere with each other’s work

Do it: Experimental Exploration: Characteristics of Parallel Circuits (Group Activity)

The position of the switch has changed. Has the control function of the switch changed?

Do working with electrical appliances interfere with each other?

Parallel circuit characteristics

When a branch circuit is disconnected, the electrical appliances on other branch circuits will continue to operate as usual.

Work. Working with electrical appliances does not affect each other

The switch on the trunk road can control all electrical appliances, while the switch on the branch road

The switch can only control the electrical appliances on the branch.

I can do it

read it

Textbook Page 107 Circuits in Life

Talk about it

Do you understand which circuits in life are connected in series? Which circuits are connected in parallel?

circuits in life

Decorative lanterns

Light bulbs decorating tall buildings

Lights, TVs, etc. in the home

Fluorescent lamps in the classroom

Are the intersection traffic lights connected in series or in parallel?

If the street lights turn on and off at the same time, are they connected in series or in parallel?

Compliance test

1. If there are two electrical appliances in the circuit, which of the following statements is correct: [ ]

A. After closing the switch S, the lights that light up at the same time must be connected in series.

B. After closing switch S, the lights that light up at the same time must be connected in parallel.

C. After closing the switch S, the lights that light up at the same time may be in parallel or in series.

D. Insufficient conditions make it impossible to determine.

2. The circuit shown in the figure below is called a ______ circuit. In the figure, switch S1 is used to control ______, switch S2 is used to control ______, and switch S is connected to the ______ circuit, it can control ______ at the same time. Use a pencil to mark the direction of current in the circuit in the diagram (after all switches are closed).

Operation

A nurse is asked to care for three patients. Every patient call requires the nurse to be informed promptly. Please design a circuit for the nurse on duty. The equipment has three lights of different colors, three switches, an electric bell, and several wires. Please draw a circuit diagram.

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Update Time: 2024-09-11

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

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