"Light up the little light bulb" electronic PPT download

Description

"Light up the little light bulb" electronic PPT download

Part One: New Knowledge Explanation

Activity Connect a simple circuit

Activity equipment: wires, batteries, small light bulbs

Activity requirements

Each student has to assemble a circuit by hand and observe the connection device of the small light bulb. Observe how the current flows inside the small light bulb.

Light up the little light bulb

A battery is a portable power source. One end of the battery is a copper cap, called the positive electrode, with the symbol "+" on it; the other end is the zinc shell, called the negative electrode, with the symbol "-" on it.

electricity flow routes

The electricity in the battery flows out from the positive electrode, flows into a metal contact of the small bulb, passes through the filament and then flows out from another metal contact, flows through the wire to the negative electrode of the battery, forming a loop. When this path is open, the small bulb Bright.

Light up the small light bulb PPT, the second part of the content: circuit break:

The electricity does not form a circuit but is disconnected. This phenomenon is called an open circuit.

The similarities and differences between open circuit and short circuit:

Difference 1:

A short circuit means that the positive and negative poles are directly connected to form a loop, and current flows through it.

An open circuit means that the circuit between the positive and negative poles is disconnected and no current flows.

Difference 2:

A short circuit will cause the system to burn down, while an open circuit will only cause the system to be temporarily unusable.

Light up the small light bulb PPT, the third part: expansion and extension

Dangers of electricity

If you do not pay attention to the safe use of electricity in production and life, disasters will also occur. For example, electric shock can cause personal casualties, sparks generated by equipment leakage may cause fires and explosions, and high-frequency electrical equipment can produce electromagnetic pollution.

Light up the little light bulb PPT, Part 4: Classroom exercises

1. The structure of the light bulb: _____, _____, _____, _____, _____.

2. Only when _______________ can the small light bulb shine.

3. There are ___ situations in the circuit: ____, _____, _____.

4. The phenomenon of wires directly connecting the two ends of the battery is called -_____.

5. _____ is very dangerous, burning the battery or even causing a fire. Therefore, during circuit experiments, avoid short circuits.

Light up the little light bulb PPT, part 5: Class summary

Using electricity to light a small light bulb requires a complete circuit. The same materials can be used to connect a complete circuit, and there are different methods. Some will circuit the small light bulb, while others will cause short circuits and open circuits.

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For more information about the PPT courseware "Electricity Lights up the Little Light Bulb", please click the "Electricity ppt Lights up the Little Light Bulb" ppt tag.

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Update Time: 2024-09-25

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

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