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Feedback Comments on Magnetism

by Ron Kurtus

A total of 673 comments and questions have been sent in. They are listed according to date.

You can read them to further your understanding of the subject.



List of next 10 letters

Topic

Title

Country

Electromagnetism Used information for research USA
 
Solenoids Ferromagnetism and solenoids Nigeria
 
Moving Charges Create Magnetic Field How does electric current create a magnetic field? Nigeria
 
Basics of Magnetism Why do opposite poles of a magnet attract? Ethiopia
 
Electromagnetism Discharging accumulator Nigeria
 
Electromagnetism Do not understand electromagnetism USA
 
Basics of Magnetism Demagnetise a magnet Zambia
 
Basics of Magnetism Which pole carries a positive charge? USA
 
Magnetic Materials Can magnetism work through different materials? United Arab Emirates
 
Magnetism How do magnets work? Australia
 

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First 10 letters


Used information for research

Topic: Electromagnetism

Question

January 13, 2016

I used this page for research for my science fair project. Don't worry, I did not copy, but I do appreciate this page on electromagnetism.

Kelsey - USA

26690

Answer

I'm glad the material was useful to you and your science fair project. It would be good to cite this website, as well as others where you got information in your report. That improves the validity of your experiment.

Best wishes for success in your project.

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Ferromagnetism and solenoids

Topic: Solenoids

Question

January 4, 2016

does ferromagnetism involves a metal core wrapped round with an coil of wire wrapped round it and connected to an electric current if yes isn't this same as a solenoid?

kevwe - Nigeria

26660

Answer

A solenoid is simply a coil of wire with no iron core. Current through the wire creates an electromagnetic field. If an iron rod is placed inside the coils, it will be drawn in. That is the concepts of a solenoid switch.
Ferromagnetism concerns forming magnets in iron objects. (Ferro = iron). A solenoid can cause an iron core to become magnetized.

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How does electric current create a magnetic field?

Topic: Moving Charges Create Magnetic Field

Question

December 15, 2015

how does an electric current creates a magnetic field when a current is passed through a wire. what is the process that goes on which causes the magnetic field to be formed by a current.

kevwe - Nigeria

26628

Answer

Electric and magnetic fields are tied together, such that when one changes, it causes the other to change. It is a property of matter.

An electron has an electric field, but there is no noticeable magnetic field until the electron starts to move. When the electron moves, it creates a magnetic field, which moves along with it. Thus, a current in a wire is surrounded by a magnetic field.

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Why do opposite poles of a magnet attract?

Topic: Basics of Magnetism

Question

October 29, 2015

why opposite poles of a magnet attract and identical poles repel each other?

moges - Ethiopia

26489

Answer

It is a property of magnetic fields and it similar to static electricity where opposite charges attract and like charges repel.

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Discharging accumulator

Topic: Electromagnetism

Question

October 8, 2015

pls.i need a detail explanation on how to discharge an accumulator or a secondary cell

Sani - Nigeria

26428

Answer

See Basics About Discharging for some information. I hope that helps.

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Do not understand electromagnetism

Topic: Electromagnetism

Question

October 8, 2015

PLS. I AM SS 2 STUDENT. ACTUALY, I AM YET NOT UNDERSTAND WHAT AND HOW ELECTROMAGNETISM TALKS ABOUT

YAHAYA - USA

26427

Answer

When you wrap a wire around a bar of iron and send direct current (DC) electricity--like from a battery--through the wire, the iron rod becomes a magnet. This is called electromagnetism.

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Demagnetise a magnet

Topic: Basics of Magnetism

Question

September 17, 2015

How can u demagnetise a magnet and how can u make a material to become a magnet eg iron?

peter - Zambia

26386

Answer

There are demagnetizer devices that you can purchase. However, you can also remove the magnetic properties of a material by sufficiently heating it.

You can turn a piece of iron or steel into a magnet using electromagnetism. See Electromagnets for information. But note that soft iron will lose its magnetism fairly rapidly. Harder steel will hold onto its magnetism.

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Which pole carries a positive charge?

Topic: Basics of Magnetism

Question

September 11, 2015

Which pole of the magnet carries the positive charge and which the negative? Is north positive or negative?

Ivey - USA

26374

Answer

Neither magnetic pole carries an electrical charge. When a wire is passes through the magnetic field between the N and S poles, electricity will flow in the wore, according to the direction of motion of the wire.

See Generating Electrical Current for more information.

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Can magnetism work through different materials?

Topic: Magnetic Materials

Question

September 9, 2015

Dear Sir,

Could you please help me out to getting the answer for the below mentioned.

1. Can magnetic forces work through differnt materials?

Awaiting for your reply as soon as possible.

Regards,

Renetha - United Arab Emirates

26366

Answer

A magnet will attract a piece of iron or another magnet if you put a piece of cardboard, glass, or other material between them. So, the magnetic forces will wrok through different material, as long as they are not too thick.

However, if you put a sheet of iron in between, the magnetic fields will be blocked by the iron.

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How do magnets work?

Topic: Magnetism

Question

September 9, 2015

How do we know how magnets work?

Callum - Australia

26364

Answer

By sprinkling iron filings near a magnet, you can see the force fields from the magnet. However, no one is really sure how the magnetic force fields push or pull on another magnet.

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