1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electromagnet winding

  1. Aug 8, 2008 #1
    Hey, anybody out there good with electrical stuff??
    I'm no genius but can I be correct in assuming the following?
    Im making high voltage electromagnets.
    If I use 1200 winds of awg30 magnet wire, it will have the same power ~ (EMF) Or (magnetic field strenghth) as 600 winds of awg15 magnet wire. Am I correct in assuming this or No? The power source is the same, and voltage too for both cases.
  2. jcsd
  3. Aug 8, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper


    15 awg wire is 5.7 times larger in diameter than 30 awg, and 32 times larger in cross-sectional area. That means the 15 awg is 32 times less resistive than the same length of 30 awg. But since your 15 awg wire will be half the length of the 30 awg, it would be 1/64 as resistive.

    So, for the same voltage applied to both wires, the 15 awg will draw 64 times as much current. With half as many windings, expect a 32 times larger magnetic field for the 15 awg.

    A table of wire diameters for different awg's can be found about 1/2-way down this page:

    p.s. if you want to make a powerful electromagnet, try to make it high current rather than high voltage.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Electromagnet winding Date
I Phase differences in Transformers Tuesday at 12:03 PM
A Fields from an AC wire Feb 21, 2018
I Current and magnetic fields Feb 4, 2018
B How long can electromagnetic waves last? Jan 30, 2018
Help to make a solenoid/Electromagnet. Jun 7, 2015