The diameter of an air coil in an electromagnet significantly affects its strength. A smaller air coil diameter results in a stronger magnetic field due to reduced magnetic field leakage, allowing more of the field to pass through the core material, whether it is iron or air. Conversely, a larger diameter coil leads to increased leakage of the magnetic field, diminishing the overall strength of the electromagnet. Therefore, for optimal performance, a tightly wrapped small air coil is preferable.
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The small coil, with the wire wrapped tightly around the iron core, will give a stronger magnet because nearly all the field of the coil passes through the iron. With a large diameter coil, much of the field does not pass through the iron - there is more leakage.Munnu said:The title is explanatory. I know that an iron core yields a stronger electromagnet. What if you have an electromagnet with an extremely tiny air coil relative to its volume? Does the small air coil diameter effect the electromagnet?
That makes sense, but what about air coils? If I don't have an iron coil but rather an air coil. Does having an extremely small air coil diameter (like almost no air coil whatsoever) affect the magnet strength?tech99 said:The small coil, with the wire wrapped tightly around the iron core, will give a stronger magnet because nearly all the field of the coil passes through the iron. With a large diameter coil, much of the field does not pass through the iron - there is more leakage.