"Simple Circuit" Electrical PPT Courseware 2

Description

"Simple Circuit" Electrical PPT Courseware 2

Modern life without electricity would be unimaginable. Occasionally, if there is a power outage, modern cities will be unable to move forward.

Why do the little light bulbs on this beautiful Christmas tree glow?

Circuit: Use wires to connect power supplies, electrical appliances, and switches to form a path for current.

Think about it:

How to control the light bulb to turn on and off?

think

1. Carefully observe the connected circuit diagrams and find out what they have in common.

2. Connect the positive and negative terminals of the battery to the two wiring points of the small bulb, and the small bulb will light up.

3. After connecting in this way, why does the small light bulb light up?

Because a path for current is formed, current passes through the filament of the small light bulb.

Exercise: How are the flashlight batteries, bulbs, and switches connected? Generally, the shell of a flashlight is made of metal. What role does it play? How to connect the battery and bulb to a plastic-cased flashlight? Try to draw the circuit diagram of the flashlight in the picture.

answer:

① The metal shell acts as a conductor.

② The plastic-cased flashlight uses wires to connect the battery and bulb.

Definition of series circuit

As shown in the picture on the left, two small light bulbs are connected in sequence in the circuit. When one light bulb lights up, the other light bulb also lights up.

Connecting the components one by one like this is called a series circuit.

Definition of parallel circuit

As shown on the left: Connect two light bulbs in parallel in the circuit, and install a switch on each. A circuit in which components are connected in parallel is called a parallel circuit.

Class exercises

1. Fill in the blanks

1. The switch has the function of controlling ____.

2. A circuit composed of __＿, __＿, __＿, __＿ is called a simple circuit.

3. When installing the circuit, the switch should be ____.

2. Judgment questions

1. The function of electricity is only to make small light bulbs shine. ( )

2. Current flows from the positive electrode of the battery to the negative electrode through the electrical appliance. ( )

After-school extension

1. Thinking: How to make more small light bulbs light up?

2. Go back and show your family what you have learned.

3. Try to make a simple traffic light and use a switch to control the on and off of the traffic light.

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For more information about the "Electricity Simple Circuit" PPT courseware, please click the "Electricity ppt Simple Circuit ppt" tab.

"Simple Circuit" PPT download:

"Simple Circuit" Electricity PPT Download Part 1 content: Import new knowledge. Each group has a dry battery, a wire and a small light bulb, and lights up the small light bulb. Conclusion: A section of wire and a battery can light up a small light bulb. The wire and battery and a small light bulb form a simple...

"Simple Circuit" Electrical PPT:

"Simple Circuit" Electricity PPT Part One Content: Circuit with Lamp Holder Connection Competition: Use a dry battery, a small light bulb, and a wire to light up the small light bulb and see who can do it quickly and well! Is it convenient to light a small light bulb by pressing it with your hand? Will the light bulb still light up if I let go?

"Exploring Voltage in Series and Parallel Circuits" Exploring Simple Circuits PPT Courseware 2:

"Exploring Voltage in Series and Parallel Circuits" Exploring Simple Circuit PPT Courseware 2 Teaching Objectives: 1. Be able to use a voltmeter to measure series and parallel circuits. Learn the basic skills of connecting circuits. 2. Know the relationship between series and parallel voltages. [Review before class] 1. The function of voltage is______..

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Update Time: 2024-06-29

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

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