"Safe Use of Electricity" PPT courseware on daily electricity use

Description

"Safe Use of Electricity" PPT courseware on daily electricity use

Self-study outline

Read the text and answer the questions:

1. The safe voltage is __________.

2.The voltage of the lighting circuit is _____.

3.The voltage of the power circuit is _____.

4. Electric shock accidents in household circuits are usually caused by ____________.

5. People usually use _____ to distinguish the live wire and the neutral wire.

6.The structure of the electric test pen______________.

7. There are two types of electric shocks in household circuits: _______ and __________; there are two types of electric shocks in high-voltage circuits: _______ and __________;

8. The “four” things must be done for safe use of electricity.

(1) ____________ (2) ____________ (3) ____________ (4)_____________

9. Once an electric shock accident occurs, you should immediately ___, ___ the circuit, or use an insulator to separate the ________, so that the person who gets the electric shock can be separated from the _________, and rescue on site should be carried out.

Classroom training

When the human body is standing on a dry wooden ladder to inspect lighting circuits, which of the following situations will not cause electric shock:?

A. Hold the live wire with one hand and the neutral wire with the other hand.

B. Hold the line of fire with one hand

C. Hold the live wire with one hand and hold the wall with the other

Analysis: Hold the live wire in one hand and the neutral wire in the other, and the current will form a loop; hold the wall in one hand, and the current will enter the wall through the human body and form a loop, which will of course result in electric shock.

Summary of safe electricity use

1. The voltage that is safe for human body use is: no higher than 36V.

2. Forms of electric shock:

"Low voltage electric shock" single line electric shock, double line electric shock

"High-voltage electric shock" arc electric shock, step voltage electric shock

3. Principles for safe use of electricity: Do not come into contact with low-voltage charged objects, and do not approach high-voltage charged objects.

4. First aid methods for electric shock (cut off the power, use a dry wooden stick to push away, artificial respiration)

Class summary

1. The value of safe voltage;

2. Causes of electric shock and several forms of electric shock;

3. Common sense about safe use of electricity.

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For more information about the "Safe Electricity Use in Daily Life" PPT courseware, please click on the "Safe Electricity Use in Daily Life ppt ppt" tab.

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Update Time: 2024-11-22

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

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