Good Ol' Magnets

Electricity and Magnetism Level 1

The diagram above depicts two bar magnets suspended by string. If "N" labels one end of the magnet as magnetic north, then determine the magnetic pole labeled with "?".

South Impossible to tell North It can be north or south

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Charlton Teo by Charlton Teo , 21, Singapore

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4 solutions

Tarek Helal
Jul 13, 2014

[n-s] [s-n]

25 Helpful 4 Interesting 8 Brilliant 2 Confused

Exactly..it can be easily found by observing repulsion between like poles..

anusha ghaligi - 6 years, 10 months ago

Is the presumption of the repulsion due to the appearance of the 'strings' connecting the magnets to the ceiling? I thought that it was impossible to tell since the 'strings' may be immovable connecting objects. Can someone clarify? Thanks! :)

Joachim Suico - 6 years, 8 months ago

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exactly it'll be north cuz.. S will repell S..

Ƨhahzaib ConfụƧxd - 5 years, 2 months ago

ok there are two magnets n-s, s-n because of repulsion they repeled oposite each other. since there is only single space between the pole they must have same pole...

Alf-archie Sangkula - 6 years, 8 months ago
Awani Mishra
Jul 13, 2014

we can see their is repulsion between the two. since like pole repel each other hence south pole is repellig south and other end is north.

11 Helpful 2 Interesting 4 Brilliant 1 Confused

I'd like to ask, what are the purposes of the other parts of the diagram? Thanks! :)

Alexander Paul - 6 years, 11 months ago

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Im not sure what u meanby other parts, basically they are hung from a place and those are string attached to the magnets. I just thought it would make it more realistic and presentable

Charlton Teo - 6 years, 11 months ago

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Oh! Got it, thanks! So the two magnets are hanging and the two south poles caused the gap in the middle of the 2 magnets.

Alexander Paul - 6 years, 11 months ago

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@Alexander Paul – yes exactly

Charlton Teo - 6 years, 11 months ago

@Alexander Paul – There are actually 4 magnets

rohit agawane - 6 years, 11 months ago

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@Rohit Agawane – I know. I was talking about the two in the middle of all four.

Alexander Paul - 6 years, 11 months ago

Yeah. Some other parts might have important meaning.

Jino Serrano - 6 years, 11 months ago
Shivansh Thapa
May 25, 2016

Repulsion between the poles shows that the other end is North [N S] [S N]

6 Helpful 2 Interesting 3 Brilliant 0 Confused
Michael Shewring
Oct 25, 2020

The magnets are repelling as indicated by the direction of the suspension. The only way they can repel is if like poles are directed toward each other

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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