Permanent Magnet vs. Electromagnet: What's the Difference?

[Xidike]

Why Does the needle of Compass always points towards the North pole ?

 

[davenn]

Why Does the needle of Compass always points towards the North pole ?

because the other end always points to the south pole ... ;)

Dave

 

[sophiecentaur]

Why Does the needle of Compass always points towards the North pole ?

Which way should it point? Is there something wrong?

 

[Sedilclue]

Same sign repulsion and different sign attraction doesn't explain WHY.
That can be the main problem here. No one is giving a nice answer.
A nice Mechanistic would ask for a mechanic model that can explain magnet properties. Instead of that Magnetic phenomena are explain as a quasi magic force.

 

[Xidike]

When a magnet is broken into pieces, each piece is found to be a magnet with two poles.

N===============S
N======S N======S


Why Does this Happens If We Broke Only South Pole then Why Does it is Automatically Converted To Both South And North Pole ?

 

[sophiecentaur]

Same sign repulsion and different sign attraction doesn't explain WHY.
That can be the main problem here. No one is giving a nice answer.
A nice Mechanistic would ask for a mechanic model that can explain magnet properties. Instead of that Magnetic phenomena are explain as a quasi magic force.

In 100+ posts there have been 'nice answers', 'easy answers', 'academic answers' and others. Unfortunately none has proved to be satisfactory.

In as far as it can't be explained without resorting to a force which cannot be seen then it could be looked upon as "quasi magic". There is not a 'mechanical' answer to the question any more than there is a 'mechanical' answer to why this table is solid. Why expect things to have answers that are easy and accurate at the same time?

 

[Xidike]

When a magnet is broken into pieces, each piece is found to be a magnet with two poles.

N===============S
N======S N======S


Why Does this Happens If We Broke Only South Pole then Why Does it is Automatically Converted To Both South And North Pole ?

 

[CWatters]

Those other poles were there all along.

 

[davenn]

When a magnet is broken into pieces, each piece is found to be a magnet with two poles.

N===============S
N======S N======S


Why Does this Happens If We Broke Only South Pole then Why Does it is Automatically Converted To Both South And North Pole ?

You can view the top single bar magnet as made up of lots and lots of tiny small magnets
creating an overall large bar magnet

D

 

[Xidike]

Why Does Magnet Become Demagnetized On Heating ??

 

[Xidike]

You can view the top single bar magnet as made up of lots and lots of tiny small magnets
creating an overall large bar magnet

D

How does the tiny small magnets form north pole at one end and the same tiny small magnets form south pole at other end ? Very odd .. huh..

 

[davenn]

How does the tiny small magnets form north pole at one end and the same tiny small magnets form south pole at other end ? Very odd .. huh..

nope, not odd at all.

the individual "particles" of iron that make up the magnet each have their own magnetic dipoles ( N and S) that when all combined and all aligned the same way, make up an overall larger magnet

and to answer your other Q about heat.
Excessive heat ( when the Curie Point) is reached, that alignment gets disrupted and the magnetic field can be weakened or even totally destroyed.

Dave

 

[sophiecentaur]

It's "very odd" that you are still asking these questions. I can hardly believe Xidike is real. You are failing the Turing test, I think.

 

[chill_factor]

nope, not odd at all.

the individual "particles" of iron that make up the magnet each have their own magnetic dipoles ( N and S) that when all combined and all aligned the same way, make up an overall larger magnet

and to answer your other Q about heat.
Excessive heat ( when the Curie Point) is reached, that alignment gets disrupted and the magnetic field can be weakened or even totally destroyed.

Dave

minor nitpick: the Curie point is a phase transition same as boiling or freezing. Its either all ferromagnetic, or its not.

 

[sophiecentaur]

minor nitpick: the Curie point is a phase transition same as boiling or freezing. Its either all ferromagnetic, or its not.

Phase transitions are at a fixed temperature for pure substances but, in many mixtures, the transition can be over a wide range of temperatures - consider what happens in engine coolant mixtures. I would expect the same to apply to magnetic materials.

 

[Xidike]

Can magnetic lines of forces be seen ??

 

[sophiecentaur]

Yes. When they vibrate at optical frequencies.

 

[davenn]

Yes. When they vibrate at optical frequencies.

yup or indirectly when you place a bar magnet under a sheet of paper and sprinkle iron filings over the paper they will display the field lines :)

Dave

PS thanks for the backup, sophiecentaur

 

[sophiecentaur]

I've given up on giving sensible answers. Looking at this guy's personal profile, I would suspect he's playing with an AI program for his contributions to this thread. He'll be asking whether magnetism ever affected your relations with your Mother next.

 

[Xidike]

if a conductor is placed in magnetic field then How can magnet cause the flow of current in that conductor ?

 

[davenn]

if a conductor is placed in magnetic field then How can magnet cause the flow of current in that conductor ?

GOOGLE IT!

You are really starting to annoy people

Dave

 

[sophiecentaur]

if a conductor is placed in magnetic field then How can magnet cause the flow of current in that conductor ?

It will cause his ticket machine to burst into flames.
You are sussed my boy.

 

[Vanadium 50]

I think we're done here.