"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 3 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Electromagnet Electroma... | 4850次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 3 is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 3, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 3
1. What is an electromagnet?
1.Definition:
An electromagnet is an energized solenoid with an iron core.
2. Structure: Coil Iron Core
2. Electromagnet:
1. Design a simple electromagnet and think about the following questions:
(1) How do you prove that your electromagnet is magnetic?
(2) How do you control the magnetism of the electromagnet?
It can be controlled by turning the current on and off.
(3) Can you control the magnetic strength of the electromagnet?
Control by changing the size of the current and the number of turns of the coil.
(4) Can you change the polarity of the magnetic poles of an electromagnet?
The polarity of its magnetic poles can be changed by changing the direction of the current.
Take a guess:
1. Is the iron core of the electromagnet originally magnetic or non-magnetic? What is your reason?
2. Do you think the core of the electromagnet is made of steel or iron? What is your reason?
Electromagnetic crane
working principle:
When the current is turned on, the electromagnet generates magnetism and picks up the iron object. When putting it down, just cut off the current.
Discussion: Based on the principle of electromagnets, explain the working principle of electromagnetic cranes.
Electromagnetic concentrator
working principle:
Different minerals have different magnetic properties. When attracted by electromagnets, these minerals receive different magnetic forces, which can separate different minerals.
Discussion: Based on the principle of electromagnet, explain the working principle of electromagnetic concentrator.
magnetic levitation train
Working principle: The repulsive or attractive force between the magnetic poles of the strong electromagnet on the train track and the magnetic poles of the electromagnet on the train makes the train levitate, eliminating friction, reducing resistance and increasing running speed.
Advantages of electromagnetic relays
1. The use of electromagnetic relays can control high voltage and high current with low voltage and low current. This prevents people from directly contacting and manipulating high-voltage and high-current switches, which may cause danger!
2. Automated control (automatic water level alarm, automatic temperature control box)
3. Remote control (when the workplace temperature is high or the environment is harsh)
practise
1. Do you know which of the following electrical appliances does not use electromagnets ( )
A. Bell B. Microwave oven
C. Electromagnetic crane D. Electromagnetic relay
2. A classmate designed an "overheating automatic alarm circuit" using a PTC resistor: install the PTC resistor where the temperature needs to be detected. When the ambient temperature is normal, the indicator light will turn on; when the ambient temperature exceeds the Curie point temperature of the PTC resistor, Due to the change in resistance, the magnetism of the electromagnet weakens, causing the alarm to sound. Please help him connect the circuit in the picture completely.
Keywords: electricity and magnetism teaching courseware, electromagnet electromagnetic relay teaching courseware, NEP version ninth grade physics PPT courseware, ninth grade physics slide courseware download, electricity and magnetism PPT courseware download, electromagnet electromagnetic relay PPT courseware Download, .ppt format
For more information about the PPT courseware "Electricity and Magnetism Electromagnet Electromagnetic Relay", please click the Electricity and Magnetism ppt Electromagnet Electromagnetic Relay ppt tag.
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 6:
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 6 Learning Objectives 1. Know what an electromagnet is. Know the advantages of electromagnets. 2. Understand the factors that affect the magnetic strength of electromagnets and be able to apply them simply. 3. Know the role of electromagnets in daily life. and application in production 4. Know electricity..
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 5:
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 5 1. Electromagnet 1. An energized solenoid inserted into an iron core is called an electromagnet. 2. Working principle of electromagnet: It uses the magnetic effect of electric current to work 3. It is magnetic when there is current flowing through it and loses its magnetism when there is no current. ..
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 4:
"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Courseware 4 1. Electromagnet Coil Core 1. An energized solenoid inserted into an iron core is called an electromagnet. 2. It is magnetic when there is current flowing through it and loses its magnetism when there is no current. 2. Magnetic properties of electromagnets Problems Magnetic properties of electromagnets..