Magnetomotive force is measured in ampere turns.
It is the current flowing through the wire, multiplied by the number of turns in the coil.
You can think of each loop in the coil as a separate magnet, and they add in series.
There are trade-offs.
If you use thinner wire to get more turns, there is more resistance, and hence less current.
If you use thicker wire to get more current, you get fewer turns in the same space.
You can concentrate the magnetic field by using a core that conducts magnetic flux better than air does,
such as iron or ferrite (an iron oxide ceramic). This works up the the saturation limit of the material,
which varies with different materials.
On Thu, Mar 29, 2018 at 12:41 PM, Nathan McCorkle <nmz787@gmail.com> wrote:
--On Thu, Mar 29, 2018 at 12:25 PM, Skyler Gordon <skgor1@gmail.com> wrote:I believe a 9V battery can provide current sufficient to produce a strong magnetic field - depending on how much copper you used.I thought field strength was proportional to current, independent of how thick the wire is (or what the metal was). (sure thinner wire will get hotter faster, and may break... but that's another concern I think)
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