MadSci Network: Physics
Query:

Re: Can magnetic field line contract or stretch like a rubber band?

Date: Sun Jul 28 14:21:56 2013
Posted By: Aaron Endelman, Senior Software Engineer
Area of science: Physics
ID: 1372129813.Ph
Message:

It seems to me, from its phrasing, that this is a school question.  Rather 
than my answering it, let me offer you some things to think about, so you 
can answer it yourself.

Let's say you have a rubber band connecting two objects.  Unstretched, the 
rubber band is a few inches long.  Start with the objects nearly touching, 
then slowly pull them away from each other.  When do you start feeling the 
effects of the rubber band?  As you pull the objects apart, does it get 
harder or easier to do so?

Now start with two magnets holding on to each other.  What happens as you 
pull them apart:  does it get harder or easier?  What about when you turn 
one of them around so that the magnets repel rather than attract?

Can rubber bands repel like magnets do?  Can magnetic fields snap (break) 
like rubber bands?

Are there minimum and maximum distances beyond which magnets no longer 
attract or repel?

Are there minimum and maximum distances beyond which rubber bands no longer 
attract or repel?

Best wishes,

Aaron




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