You should have learned magnetism in form 3. In form 3, you learned that:

  1. A magnet can attract certain type of metal.
  2. The metals that can be attracted by a magnet are called the “magnetic materials” of “ferromagnetic materials”. Examples of magnetic materials are iron, steel, nickel and cobalt.
We also learned that a magnet has 2 poles-the North Pole and the South Pole. There is a magnetic field surrounding the magnet. A magnetic field is a region in the surrounding of a magnet which a magnetic material experiences a detectable force.

Magnetic Field Line
The magnetic filed of a magnet is represented by the magnetic field line. The magnetic field line flowing out from the North pole and flowing into the South pole.

The distance between the field lines represent the strength of the field, the closer the field line, the stronger the field. In the diagram, the magnetic field A is stronger than magnetic field B because the line in magnetic field A is closer.

Compass in a magnetic Field

The pattern and the direction of a magnetic field can be determined by a compass. The pointer of the compass is always in the direction of the magnetic field. In figure (b) above, we can see that when a few compasses are put near to a bar magnet, the pointer of the compasses are all in the direction of the magnetic field.

If a compass is placed near to a current carrying wire, the pointer of the compass will point along the direction of the magnetic field generated by the current. This will discuss in electromagnetism.

Youtube Video


  1. Sek // July 18, 2008 at 1:37 AM  

    Visitors are welcomed to post question or give further expiation to the topic at the comment column.

    The "Post Comment" window can be accessed by clicking on the "comment" hyperlink.

  2. Unknown // February 19, 2009 at 8:07 AM  

    OK, first off- Thanks. This site is really helpful, and has cleared quite a few doubts.

    However, I still am a little confused.
    1) Can you explain the change of the compass point direction in a bar magnet and a straight conductor? What do you mean when you say that 'it points in the direction of the field,and so it points to the north?


  3. Sek // February 19, 2009 at 8:15 AM  

    Shreyas, TQ for your question.

    The magnetic field is coming out from the South pole, directing towards the North pole.

    Therefore, if you put a compass in a magnetic field, the pointer of the compass will be in the same direction as the field.

  4. tHe ElIxir // May 5, 2009 at 5:04 AM  


    referring to shreyas's question earlier. But i thought the compass pointer always points to the north no matter what? so what do you mean when you say "the pointer of the compass will be in the same direction as the field."?


  5. Sek // May 5, 2009 at 8:37 AM  

    tHe Ellxir,

    First of All, the compass is always pointing towards the North of Earth, but not the North of the "magnetic field of the Earth". Actually, the pole of the magnetic field of the earth at the North of Earth is the "South Pole" but not the North Pole.

    As you can see in the diagram above, the compass is actually pointing away from the North pole and pointing towards the South pole or it is always pointing in the direction of the field.

  6. Anonymous // June 12, 2009 at 1:21 AM  

    first of all, thank you for posted all of these...
    it's so useful to me to prepare my SPM...

    but i have a few questions...
    what is is just only the things that can be attracted by the magnet?
    can i have some example?

  7. AUTO FlexiLoad // April 5, 2019 at 2:34 PM  

    I am very impressed for your great information.Thanks a lot for sharing.
    Flexiload Software Available here

  8. Data anlytic // August 1, 2019 at 10:29 AM  

    It’s been an incredible Journey with UNIMAS for the last few years and we are proud that we are recognized as their
    Data Science Training training delivery partner.
    ExcelR successfully handled many batches in this university.
    With our quality delivery and top notch brand reputation, UNIMAS accredited our training program and recognized ExcelR as an official partner to deliver various certification
    programs through their university. Avail globally recognized certification from UNIMAS by completing Data Analytics course in ExcelR.

    Data Science Training

    keywords:data science training,data science course

  9. EST of SEO // August 18, 2019 at 12:42 PM  

    LogoSkill, Professional Logo Design Company Company is specifically a place where plain ideas converted into astonishing and amazing designs. You buy a logo design, we feel proud in envisioning
    our client’s vision to represent their business in the logo design, and this makes us unique among all. Based in USA we are the best logo design, website design and stationary
    design company along with the flayer for digital marketing expertise in social media, PPC, design consultancy for SMEs, Start-ups, and for individuals like youtubers, bloggers
    and influencers. We are the logo design company, developers, marketers and business consultants having enrich years of experience in their fields. With our award winning
    customer support we assure that, you are in the hands of expert designers and developers who carry the soul of an artist who deliver only the best.

    Professional Logo Design Company

  10. Diana Welch // September 18, 2019 at 6:01 PM  

    Electromagnetism gives life to Physics.

    Supplier of 17 Inch dually wheels
    We have the largest selection of custom 17 inch truck wheels for you to choose from; the best quality, newest designs and best styles from the leading brands at the Lowest Prices. With wheels for trucks, Jeeps, SUV's, imports, sports cars, and luxury cars, 4WheelOnline is committed to providing the highest quality wheels that will transform your ride

  11. johng // October 14, 2019 at 7:02 AM  

    Thanks a lot for sharing
    Having good health is what most people out there wants but can not achieve. some people takes drug to get it.

  12. alez // October 31, 2019 at 6:33 AM  

    Thanks a lot for sharing
    Having good health is what most people out there wants but can not achieve. some people takes buy hydrocodone online AND moon rock to get it.

  13. Huy Blog // November 24, 2019 at 4:05 AM  

    The content of your article is very good, thank you for sharing this content, thuê wifi du lịch mỹ

  14. documentary-film // December 3, 2019 at 6:51 AM  

    Great Article I love to read your posts because your writing style is too good, its is very very helpful blog

    by : cheap store

  15. australiaeta // December 5, 2019 at 7:44 AM  

    Thank you very much for your information.
    Australia ETA/eVisitor Visa
    is quiet easy to apply online from Singapore,
    Malaysia, United Kingdom, United States, Canada, France and including all others ETA Eligible Countries from our website.

  16. gembet99 // December 5, 2019 at 10:33 AM  

    This article content is really unique and amazing.This article really helpful and explained very well.So i am really thankful to you for sharing keep it up..


  17. Unknown // December 14, 2019 at 5:30 AM  

    This article content is really unique and amazing.This article really helpful and explained very well.So i am really thankful to you for sharing keep it up..

    dubai city tour

  18. Sid // December 28, 2019 at 1:09 AM  

    best ever i seen content on any website as i search every day on google. good work keep it on.
    Are you looking for a property in Bhubaneswar then contact kalinga keshari rath
    kalinga keshari rath
    kalinga keshari rath

  19. Lloyd // December 30, 2019 at 2:37 PM  
  20. Lloyd // December 30, 2019 at 2:37 PM  
  21. My Company Wala // December 31, 2019 at 10:19 PM  

    best ever i seen content on any website as i search every day on google. good work keep it on.
    contact us

  22. My Company Wala // December 31, 2019 at 10:25 PM  
  23. Lilly Aha // January 1, 2020 at 12:04 AM  

    i really like this. if you ever go to dubai or on vacations . must visit this website they have discounts on every tourist places hotels. jus take a look. and keep up the good work. your blog is fantastic.
    luxury desert safari

  24. Yostbuddy // January 11, 2020 at 10:57 PM  

    amazing post thanks for sharing with us.
    india republic day

  25. Bams // January 13, 2020 at 8:44 PM  

    thanks for your informasion and dont forget visit my website at jasa backlink pbn

  26. Lloyd // January 17, 2020 at 8:33 AM  
  27. Honeywell Air Purifier // January 18, 2020 at 6:42 AM  

    There is nothing wrong to say that with just pocket-friendly price tags you will get unmatched performance as compare to the other brands. However, Honeywell air purifier HPA304 does lack some component features like smartness, noise level, set & forget mode but still it is really worthy to place in your room. Where Get Best Air Purifiers Best To Buy In 2020

  28. Research chem // January 19, 2020 at 2:31 AM  

    Reading on the recent ban on dank vapes have made everyon buy weed online and the FDA looks like they are serious this time around.But with weed for sale online, what makes it so certain that we won't see others online without medical marijuana cards buy marijuana or
    mail order cannabis online. This has created a big confusion in the marijuana dispensaries near me regading the issue of
    marijuana for sale online
    Some good articles on buy weed online or marijuana for sale have been published but the reecent ban on Juul pods and juul pods for sale or juul pods online have created dispair on the population. So what is your take on the recent ban on juul? But the weed for sale industry is gradually taking over. Click here to get some insights on medical marijuana for sale and shrooms for sale online .Dank Vapes

  29. Unknown // January 20, 2020 at 9:23 AM  

    Free HTML templates in Pgtemplates
    We are free to HTML website. You can Download now. We have mare html themes. Our all HTML templates is free. You can any template and start your website.
    Please Visit:
    Wish you guys a happy new year.

  30. April // January 21, 2020 at 1:49 PM  

    We are here to provide you with carefully crafted and top quality medical products through a wide selection.

    Buy marijuana online

    Moon Rocks

    Gummy Bears

    Hash Oil

    CBD Isolate


  31. Bams // January 21, 2020 at 10:44 PM  

    thanks your post and share and visit my web at 5 Tips Merawat Website Agar Ramai Pengunjung

  32. thierry gola yakelle // January 21, 2020 at 11:12 PM  

    Welcome to Scottish Fold Cattery and thanks for your interest click here to Adopt A Scottish Fold Kitten online to our scottish cats and kittens For sale! My name is VERA S. Matt. Me and my husband Owns the small scottish fold farm with the best Scottish fold kitten prices and share my biggest hobby/ Scottish Fold Kittens For Sale cat breeding hence scottish fold Breeders. We breed breeds Scottish Folds. All our Scottish Fold cats have very special Grand Champion blood lines from Europe . We love our cats, they live in the Cattery with us.Scottish Folds are known to be very good natured, affectionate cats who are very human-orientated and become extremely attached to their Scottish Fold Cats They are easy going and will appreciate the company and cubby holes of any type. They enjoy attention and are not usually shy with strangers. Affectionate without being “pushy”,they make ideal pets and companions.scottish cats and kittens For saleBrowse through our available scottish fold cats and see the Munchkin Scottish folds,Grey Scottish fold kittens,Black scottish fold kittens Since we offer shipping worldwide.Scottish Fold kittens breederKittens For Sale at the catter.Scottish fold kitten prices We also offer Scottish fold kittens near me,Scottish Fold Breeders,Scottish fold Price.
    Buy passport online We are a group of unique experts who manufacture real and fake passports, IDs, buy driver’s licenses and other documents proving your identity or qualification. We have many years of experience in this field that’s why you can be absolutely sure that no matter what you order from us, you will always receive a high-quality document that meets the necessary…buy IELTS certificate online
    Buy passport online
    buy registered documents online

  33. Megaonlinebudshop // January 22, 2020 at 8:32 AM  
  34. Bams // January 23, 2020 at 12:11 AM  

    thanks your post and share and visit my web at