What can be increased in order to increase the magnetic field?

Question

egenriether · Answer

sounds like multiple choice.  What are the choices?  recall, a magnetic field is a function of electric current that makes it, and some medium (with a magnetic permeability) that magnifies it.

anonymous · Answer

They're:

The size of the iron core
		
The magnetic poles
		
The wire resistance
		
The current
I'm not trying to get someone to do it for me, science just doesn't click in my mind.

anonymous · Answer

@egenriether

egenriether · Answer

well the current is the answer.  When electrons flow in a wire, they make a magnetic field around the wire that is proportional to the current.  i.e. double the current, double the magnetic field intensity.

anonymous · Answer

Oh gotcha, thanks a lot!!! @egenriether