"Make a Small Switch" Electric PPT Courseware 2

Description

"Make a Small Switch" Electric PPT Courseware 2

What is a switch?

Can connect or disconnect the circuit and control the working status of the electrical components in the circuit

Observation skills

1. How are the batteries and small light bulbs installed?

2. What is the path of current in the circuit? Try to mark the path of the current.

3. Observe the switch of the flashlight and see what materials the switch is made of.

flashlight switch

Think about the picture:

1. How does the flashlight switch control the on and off of the current?

2. In this picture, is the flashlight on or off? Why?

Flashlight observation summary

1. Installation of batteries and small light bulbs

2. Current path:

3. The flashlight switch is composed of plastic and copper pieces. Push the red plastic push button and the two copper pieces will come into contact and the circuit will be connected.

Better hands-on ability

remind:

Be careful not to leave thumbtacks on the ground, otherwise you may injure your feet; focus on cooperation.

Research on production methods of traffic lights

Thinking expansion:

We press the paper clip onto the thumbtack below, and the light behind the thumbtack will light up. Now I want to add a light, what should I do?

various switches

Most electrical appliances have switches, some are contact type and some are non-contact type, such as remote control switches. The remote control switch controls the current on and off by sensing light, sound, etc. Some switches are placed in the open, such as the light switch on the wall; some switches are hidden in the dark, such as the light switch inside the refrigerator.

Class exercises

1. The picture below shows the three switches designed by Xiao Ming. Please determine which switch can be used and which switch cannot be used?

2. Which of the following materials can be used to make switches? What can't be done?

After school activities:

Please go home and investigate the switch of at least one household appliance and what kind of switch it is.

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For more information about the PPT courseware "Electricity Makes a Small Switch", please click the Electricity ppt Makes a Small Switch ppt tag.

"Make a Small Switch" Electric PPT:

"Make a Small Switch" Electricity PPT Part One Content: Observe the Flashlight Observe the materials used in the flashlight. Which of these materials are conductors and which are insulators? Observe the structure of the flashlight. How are the batteries and small light bulbs installed? What is the path of current in a circuit...

"I'll make a small switch" PPT courseware 2:

"I'll Make a Small Switch" PPT Courseware 2 Do you still remember the reason why the small light bulb shines? When the current flows from one end of the power source through the wire, flows through the small bulb (circuit), and returns to the other end of the battery, forming a complete loop, the small bulb will glow. As long as the electricity can...

"I'll Make a Small Switch" PPT courseware:

"I'll Make a Small Switch" PPT Courseware Compare Observation Skills 1. What is the path of the current in the circuit? Try to mark the path of the current. 2. Observe the switch of the flashlight and see what materials the switch is made of. Flashlight observation summary 1. Current path: Figure 1..

File Info

Update Time: 2024-11-13

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

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