P3F Electromagnetism by https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh en-us 2021-09-23 09:06:47 UTC 2024-10-14 02:40:32 UTC hello@padlet.com AN EXAMPLE liang_hong_poh https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1762481128 Name:  Jeremy
Source: https://mocomi.com/what-is-electromagnetism/

What is an electromagnet?

An electromagnet is a magnet whose magnetic field is created when electricity is flowing. This type of magnet is different from the refrigerator magnets that you use to decorate your refrigerator. A refrigerator magnet is a kind of permanent magnet made of magnetic material that continuously generates a magnetic field. On the other hand, electromagnets are built and produce a magnetic field only when required.
]]> 2021-09-23 09:16:18 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1762481128 science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779584200 name Tristan
source https://kids.kiddle.co/Maglev_train

Electromagnets are similar to other magnets in that they attract metal ...]]> 2021-09-29 23:49:12 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779584200 science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779595516 name Tristan
source
https://kids.kiddle.co/Electromagnet

 Electromagnets are temporary and artificial magnets. They are magnets that are only magnetic when there is a coil of wires



]]> 2021-09-29 23:56:46 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779595516 loojeron3003 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779608973 name Jeron
With magnets, opposite poles attract and like poles repel each other. This is the basic principle behind electromagnetic propulsion.
https://kids.kiddle.co/Maglev_train
]]> 2021-09-30 00:04:50 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779608973 loojeron3003 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779611192 name Jeron
With magnets, opposite poles attract and like poles repel each other. This is the basic principle behind electromagnetic propulsion.
https://kids.kiddle.co/Maglev_train
]]> 2021-09-30 00:06:14 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779611192 2 interesting facts about electromagnet (Science) https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779637434 Name: Joel Teoh Kai Wen
URL:https://www.bbc.co.uk/bitesize/guides/z3g8d2p/revision/4
Fact: Electromagnets are magnet or magnetic materials operated with electricity. They are very powerful and are used in junkyards to carry heavy objects such as cars and trucks into a place so that they can be decomposed into new cars and trucks.

P.S. I didn’t really copy. I wrote by myself with all the facts I learned from books.]]> 2021-09-30 00:20:19 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779637434 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779663489 They use 🧲 magnets to make products that we can use.

]]> 2021-09-30 00:32:04 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779663489 electro magnet https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779725710 Name Beren
Electro magnet is stronger than a normal magnet that is the advantages disadvantage is that it will take longer to make.
source

Electronics Tutorials
Electromagnet, Electromagnetic Coil and Permeability

Visit
Images may be subject to copyright. Learn More
]]> 2021-09-30 00:56:22 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779725710 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779742776 t can be turned on and off by cutting of the electrical current. It does minimal harm to the human body because it's not using x-rays like an x-ray does. It is easy to use and can help is many medical and casual things. Electromagnetism is the reason why we can

t can be turned on and off by cutting of the electrical current. It does minimal harm to the human body because it's not using x-rays like an x-ray does. It is easy to use and can help is many medical and casual things. Electromagnetism is the reason why we can 
https://www.bing.com/images/search?view=detailV2&ccid=lvclNWSI&id=71E51D6ED59B0F8C017C47495F9532C510211F92&thid=OIP.lvclNWSIMZkJ5J1Rt8gCKwHaG5&mediaurl=https%3a%2f%2fwww.radicalindia.com%2fimages%2flarge%2fSL%2fel-2.jpg&exph=1500&expw=1610&q=+electromagnet&simid=607996347961127488&FORM=IRPRST&ck=5397A0AD6130C1F9F820C8F88F932B4D&selectedIndex=4

Name :Hasef







]]> 2021-09-30 01:03:06 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779742776 ELECTROMAGNET https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779760806 Name : Chloe Chia Yi Fei
source: https://kids.kiddle.co/Electromagnet

Electromagnets are temporary magnets. They are magnets that is only when there is a coil of wire with electricity through it.

]]> 2021-09-30 01:10:30 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779760806 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779781067 name Beren
source: I couldn't find the source

1st It helps in daily life
2nd an electro magnet is a very strong magnet that can attract thing further than usual

]]> 2021-09-30 01:18:48 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779781067 SCIENCE https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779787324 Name: Chloe Chia Yi Fei
Source:https://kids.kiddle.co/Crane_(machine)
Cranes are commonly in the transport industry for the loading and unloading freights, in the construction industry for the movement of materials, and manufacture industry for heavy equipment.


]]> 2021-09-30 01:21:19 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779787324 1. What are the advantages and disadvantages of using electromagnets at work?2. 1 to 2 interesting fact(s) about electromagnets that you would like to share. nunna_kushal https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779836502 Light carries information in ways you may not realize. Cell phones use light to send and receive calls and messages. Wireless routers use light to send pictures of cats from the internet to your computer. Car radios use light to receive music from nearby radio stations. Even in nature, light carries many kinds of information.  

Telescopes are light collectors, and everything we know from Hubble is because of light. Since we are not able to travel to a star or take samples from a faraway galaxy, we must depend on electromagnetic radiation — light — to carry information to us from distant objects in space.

The Hubble Space Telescope can view objects in more than just visible light, including ultraviolet, visible and infrared light. These observations enable astronomers to determine certain physical characteristics of objects, such as their temperature, composition and SPEED







]]> 2021-09-30 01:40:02 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779836502 what are the advantages and disadvantages of using electromagnetism. https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779862140 One advantage to use and electromagnetic energy source is that the electromechanical device used, you don't need an external electrical source to generate electrical power.

One disadvantage Electromagnetic power can be dangerous to use, for instant if you need to have a power source that must have a regulated current output, both AC and DC power generators would need to be run at a non-varying speed.

source :
https://sciencing.com/advantages-disadvantages-ac-generators-5783965.html

]]> 2021-09-30 01:49:49 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779862140 Cool facts about magnets https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779891145 Magnets come in 4 flavors - One example : 
Ferromagnets which include substances like iron and nickel. They make good permanent magnets. Another type of magnet called ferrimagnets and only some of the electron spins are aligned.  

Read More Source 
https://www.livescience.com/47383-cool-facts-about-magnets.html

]]> 2021-09-30 02:01:24 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1779891145 How does a electromagnet work? https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780021758 Source : https://m.kiddle.co/s.php?q=how+does+a+electromagnet+work#gsc.tab=0&gsc.q=how%20does%20a%20electromagnet%20work&gsc.page=1
Name: Grace]]> 2021-09-30 02:51:43 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780021758 Science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780052927 Source: https://m.kiddle.co/s.php?q=what+are+some+of+the+industries+that+make+use+of+electromagnets#gsc.tab=0&gsc.q=what%20are%20some%20of%20the%20industries%20that%20make%20use%20of%20electromagnets&gsc.page=1]]> 2021-09-30 03:04:36 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780052927 How does an electromagnet work? https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780056176 By: Janelle Ho (3F)
Electromagnets are temporary magnets that are made out of batteries and wire. Electricity passes through the electromagnets and allows the magnetic material that is connected to the batteries to become a temporary magnet.

]]> 2021-09-30 03:06:00 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780056176 What are some industries that make use of electromagnets https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780094246 By: Janelle Ho (3F)

Electromagnets can be used in a scrapyard to separate scrap iron and steel from the rest of the scrap.
Electromagnets are also used in school electric bells in most schools.]]> 2021-09-30 03:21:21 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780094246 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780094414 name :Thanvi
source:
https://kids.kiddle.co/Electromagnet

Electromagnets act as temporary magnets when a coil of wire running on electricity.
when the number of batteries increase, the magnetic field around the materials is also increased making the electromagnets stronger.

]]> 2021-09-30 03:21:26 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780094414 Name: Kiara https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780157171 Source: https://monroeengineering.com/blog/how-does-an-electromagnet-work
How does an electromagnet work: When electricity moves, it creates a magnetic field. Electricity will flow through the wire, and produce a magnetic field. ]]> 2021-09-30 03:48:45 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780157171 Name: Kiara https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780174351 Source: https://www.sg.endress.com/en/field-instruments-overview/flow-measurement-product-overview/Electromagnetic-flowmeters
Electro flowmeters are applicable for all liquids, such as water and many others. ]]> 2021-09-30 03:56:59 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780174351 science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780186842 BY:AARIFF

electro magnets are controlable
source:https://monroeengineering.com/]]> 2021-09-30 04:03:18 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780186842 What are the advantages and disadvantages of using electromagnets? https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780231387 Name: Kayden Ng
Source: https://www.google.com/search?q=What+are+the+advantages+and+disadvantages+of+using+electromagnets

Disadvantages: Disadvantages of electromagnets is it will heat up very fast due to conduct of heat. This heat generation will lose of electrical energy . Maintaining its constant invisible magnetic field.

Advantages: The main advantages of an electromagnet , a permanent magnet is that the invisible magnetic field can be very fast being changed by controlling the amount of electricity in the winding. A permanent magnet that do not need power, the electromagnet requires a permanent continuous supply, current to maintain the magnetic field.]]> 2021-09-30 04:26:43 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780231387 magnets https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780292243 2021-09-30 04:58:20 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780292243 ELECTROMAGNETS https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780357188 This is called an electromagnet.This are the steps to make an electromagnet
1.coil a long piece of wire around the iron nail at least 20 times
2.Connect both ends of the wire to a battery.
3.Test to see if the iron nail can attract any small magnetic object.
Name:Naura Aamily]]> 2021-09-30 05:33:55 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780357188 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780378656 Electromagnets can be used or found from a telephone or other iron things.
Name:Naura Aamily]]> 2021-09-30 05:46:42 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780378656 2 interesting facts about electromagnetism https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780529698 Name: Kayden Ng
Source:
https://www.google.com/search?q=interesting+facts+about+electromagnetism

1]: Electromagnetism is a two link between electricity and magnetism. An electric
current makes a invisible magnetic field, and a normal magnetic field, when it is being change, it will create a voltage. The discovery of this link led to the invention of electric motorcycle, generators and others

Source: 
https://www.apexmagnets.com/news-how-tos/8-strange-facts-about-magnets-and-magnetism/
 
2]: Magnets have two poles , if you cut them in half. Magnets will have two poles, a  North pole and South pole.  If we take a bar magnet and cut it in half, the two remaining pieces will still have a North and a South. You can cut it dozens of times and the results will be the same.
]]> 2021-09-30 07:04:43 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780529698 electromagnet https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780562357 Our magnets with low irreversible flux loss have stable flux under high temperature. Our magnets with low weight loss maintain a high performance during the whole lifetime. 15+ Invention Patents. ISO14001, ISO45001. 24+ years experience. offer One-Stop Production.]]> 2021-09-30 07:20:20 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780562357 Science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780693139 Electric doorbells are commonly found around us. The magnetic field cause by the electromagnet is then used to power a machine that creates the doorbell sound.]]> 2021-09-30 08:25:46 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780693139 Interesting facts about electromagnetism https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780819850 1. Used in MRI Machines - MRI machines are medical imaging devices that are used to diagnose injuries and illnesses in people. 
 
2.  Adjustable Power Level - The power of their magnetic field can be adjusted by increasing or decreasing the amount of electricity flowing through the wire coils. The more electricity that flows through the wire coils, the stronger the magnetic field will be. Permanent magnets don’t offer an adjustable power level. They produce the same, consistent magnetic field at all times. 

Name  : Jun Yi




]]> 2021-09-30 09:28:02 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780819850 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780890353 Electromagnets have some advantages over permanent magnets. They can be turned on and off. The strength of the magnetic field can be varied.

Disadvantages of using electromagnets will  lose of electrical energy very  much. Because they heat up very fast.

Jun Yi]]> 2021-09-30 10:08:12 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1780890353 science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782861696 It always points to the south north direction when it come to rest.The poles of the magnets are stronger.
Hakim.]]> 2021-10-01 01:02:28 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782861696 science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782883877 Magnets are for pepole hwo needs to get something very far.
Hakim.]]> 2021-10-01 01:12:07 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782883877 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782991120 Thanvi
3F.          
Source   https://www.sg.endress.com/en/field-instruments-overview/flow-measurement-product-overview/flowmeters        

electro magnets are used in telephone 
factories. They are used carry heavy or bulky things.

        

electro magnets are used in telephone 
factories. They are used 

       

]]> 2021-10-01 01:57:39 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1782991120 How to make an electromagnet stronger! https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788790740 Electromagnets
When an electric current flows in a wire it creates a magnetic field around the wire. By winding the wire into a coil we can strengthen the magnetic field. Electromagnets are made from coils like this.

We can make an electromagnet stronger by:

  • wrapping the coil around an 
  • iron core
  • adding 
  • more turns
  •  to the coil
  • increasing the current
  •  flowing through the coil

A coil of wire wrapped around a nail connected to a battery and switch


The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.

Relays are electrically operated switches. They use an electromagnet, often to control a high-power circuit using a low-power signal or where multiple circuits need to be controlled by one circuit.

By Bryan Chia


]]> 2021-10-04 07:22:08 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788790740 About electromagnet voltage. https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788815084

A magnet and a coil of wire can be used to produce an electric current. A voltage is produced when a magnet moves into a coil of wire. This process is called electromagnetic induction. The direction of the induced voltage is reversed when the magnet is moved out of the coil again. It can also be reversed if the other pole of the magnet is moved into the coil.

If the coil is part of a complete circuit then a current will be induced in the circuit.

Notice that no voltage is induced when the magnet is still, even if it is inside the coil.

To increase the induced voltage:

  • move the magnet faster
  • add 
  • more turns
  •  to the coil
  • increase the strength of the magnet

]]> 2021-10-04 07:34:44 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788815084 2 interestining facts about electromagnetism https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788867912 Electromagnets are controllable. This is one of the features that distinguish them from traditional, solid magnets. Other magnets generate a permanent magnetic field. The magnetic field is generated by the ferromagnetic material of which they are comprised. Electromagnets are different because they only generate a magnetic field when electricity flows through the wire coils. By disrupting the flow of electricity through the wire coils, the magnetic field can be disabled.

Another unique feature of electromagnets is an adjustable power level. The power of their magnetic field can be adjusted by increasing or decreasing the amount of electricity flowing through the wire coils. The more electricity that flows through the wire coils, the stronger the magnetic field will be. Permanent magnets don’t offer an adjustable power level. They produce the same, consistent magnetic field at all times. by bryan chia]]> 2021-10-04 08:02:04 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1788867912 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791129379 2021-10-05 00:09:17 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791129379 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791138099 2021-10-05 00:14:07 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791138099 https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791140076 2021-10-05 00:15:07 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791140076 P3F Science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791460509 Name: Low Ooi Yuen
Source:
https://kids.kiddle.co/Image:Flux_compression_generator_1.png

A hollow metal tube athat is covered with wire  of explosively pumped flux compression.


]]> 2021-10-05 02:20:20 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791460509 P3F Science https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791500953 Name:Low Ooi Yuen
Source:https://kids.kiddle.co/Maglev_train

Electromagnets are similar to regular magnet , but they can be turned on and off.]]> 2021-10-05 02:36:22 UTC https://padlet.com/liang_hong_poh/9udf2jc4tmmwc6dh/wish/1791500953