"Conductors and Insulators" Electrical PPT Courseware

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"Conductors and Insulators" Electrical PPT Courseware

1. Observe the circuit connections and talk about how current flows in the circuit.

2. If you cut the wires in the circuit, what will happen and why?

3. Use the following method to reconnect the cut wires. Will the small bulb light up?

(1) Touch the two plastic skins together

(2) Contact the metal head and plastic skin together

(3) Connect the two metal heads together

This in the end is why?

Copper wire conducts electricity easily

Plastic does not conduct electricity easily

Among the objects around us, some are easy to conduct electricity and some are not. How can we know the conductivity of an object?

How to check whether rubber is conductive?

1. Predict whether the rubber can pass electric current to make the small light bulb light up, and keep records.

2. Make the two detection heads of the "circuit detector" contact each other to check whether the small bulb emits light.

3. Use two detection heads to touch both ends of the rubber, observe whether the small bulb emits light, and record the observation results in Test 1 of the table.

4. Repeat the test once and record the observation results in Test 2 of the table.

5. Summarize the two test results and record whether the rubber is easily conductive.

6. The material clerk puts away the rubber that has been tested.

Things to note during the experiment:

(1) Learn to divide labor and cooperate.

(2) Predict, detect and record sample by sample.

(3) Each object is continuously detected twice.

(4) After the materials are tested, they will be kept by the material clerk to prevent confusion.

(5) Pay attention to safety.

(6) Control the sound.

We have discovered that the wire is covered with plastic and is a copper wire inside.

Copper wire allows electric current to pass through, but plastic cannot allow electric current to pass through.

An object like a copper wire that easily allows electric current to pass through it is called a conductor.

An object such as plastic wrapped around a wire that does not allow current to pass easily is called an insulator.

Among the materials we selected, which ones are conductors? What are insulators?

Conductors: Knife, paper clip, key

Insulator: rubber, cardboard, plastic ruler

I know

1. When using a circuit detector to detect whether the rubber is conductive, first touch the two detection heads of the circuit detector and observe whether the bulb emits light. ( )

2. All metal materials are conductors. ( )

3. We use insulators to prevent current from flowing to places where people don’t need it, so we must protect these insulators well. ( )

4. The outside of the wire is wrapped in plastic because plastic is an insulator ( )

5. Do not wipe electrical appliances, sockets and switches with wet cloth, and do not touch them with wet hands. ( )

6. Tap water is a conductor. ( )

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For more information about the "Electrical Conductors and Insulators" PPT courseware, please click on the Electrical ppt Conductors and Insulators ppt tab.

"Conductors and Insulators" PPT download:

"Conductors and Insulators" Electric PPT Download Part One: Introduction of New Knowledge Use the following three methods to connect the detection head and observe whether the small light bulb will light up. (1) Connect the two plastic skins together (2) Connect the metal head and the plastic skin together (3) Connect the two metal heads...

"Conductors and Insulators" Electrical PPT:

"Conductors and Insulators" Electricity PPT Part One Content: Detecting whether the objects around us are conductive. Among the objects around us, some are easy to conduct electricity and some are not. How can we know the conductivity of objects? How to test whether a piece of rubber is conductive? ..

"Conductors and Insulators" PPT courseware:

Hunan Education Edition fifth grade science volume 1, conductors and insulators PPT courseware, the first part of the content: circuit detector circuit detector 1. Why does the small light bulb light up? 2. What will happen if you cut off the wires in the circuit and why? 3. Is there any way to reconnect...

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Update Time: 2024-11-23

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

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