Bozongle wrote:Let's get a bit of Shock Value/magnetism in here.
You have two electromagnets. Electromagnet A and Electromagnet B. They both have the same number of turns (N=100), same current going through them (I=1A), and same metal cores (Iron). However, Electromagnet A is half the length of Electromagnet B. Which one has the greater magnetic field, and why?
[hide]Electromagnet A, because the magnetic field is equal number of turns*I*perm. of free space is divided by the length. If you have a larger length (as does em B) then there will be a smaller magnetic field. Therefore, em A has a larger magnetic field [/hide]
Isn't this more of a Maglev question? I have never seen something like this on my circuits tests, but this equation comes up all the time in my MagLev tests