"How to use electricity safely" Household circuits and safe electricity use PPT courseware 3

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"How to use electricity safely" Household circuits and safe electricity use PPT courseware 3

1. Prevent overloading

Read the text and figure out the following questions:

1. What is overload? Use electrical knowledge to analyze the reasons for excessive current during overload.

2. What are the dangers of overload?

3. What measures should be taken to prevent overloading of household circuits?

Reasons for excessive current during overload:

When overloaded, the total power of the circuit is too large. According to I total = P total/U, (U remains unchanged), the total current in the circuit is too large.

What measures are taken to prevent overloading?

1. Try not to let multiple high-power electrical appliances work at the same time;

2. Use branch power supply when designing household circuits;

3. High-power electrical appliances adopt independent power supply.

2. Never short circuit

Read the text and figure out the following questions:

1. What is a household circuit short circuit? Use electrical knowledge to analyze the reasons for excessive current during overload.

2. What is the reason why aluminum foil strips burn during activities? It can be seen from this that what is the danger of short circuit?

3. Avoid electric shock

Read the text and figure out the following questions:

1. What is the voltage of the household circuit? What is the safe voltage value for the human body? What did you find when comparing the two?

2. Observing Figures 18-12, what do you find in common among the various forms of electric shock?

3. In order to use electricity safely, what are the requirements for electrical installation?

4. When electrical appliances leak, what are the benefits of connecting the ground wire?

5. What should you pay attention to when purchasing electrical appliances?

Summarize

To use electricity safely, you must:

Prevent overload

Never short circuit

avoid electric shock

Electrical installation meets requirements

Purchase electrical appliances with 3C certification

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For more information about the PPT courseware "Household Circuits and Safe Use of Electricity, How to Use Electricity Safely", please click on the PPT tag of "Household Circuits and Safe Use of Electricity, How to Use Electricity Safely".

"How to use electricity safely" Household circuits and safe electricity use PPT courseware 2:

"How to Use Electricity Safely" Home Circuit and Safe Electricity Use PPT Courseware 2 Review review: 1. The composition of the home circuit: It consists of the main switch of the household line electric energy meter, the fuse socket, the switch, and the electrical appliances. 2. How to distinguish the live and neutral wires with a test pen? Neon tubes glow...

"How to use electricity safely" PPT courseware on household circuits and safe electricity use:

"How to use electricity safely" PPT courseware on household circuits and safe electricity use. Electricity is a toothless tiger. Have you experienced or heard of any accidents caused by carelessness in using electricity safely? Please give an example! For example: tripping caused by overload, fire caused by short circuit, casualties caused by electric shock..

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Update Time: 2024-11-22

This template belongs to Physics courseware Guangdong and Shanghai Edition Ninth Grade Physics Volume 2 industry PPT template

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