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!

Solenoid Magnetic Field wire spacing Help

  1. Aug 6, 2010 #1
    1. The problem statement, all variables and given/known data
    You have 12m of 0.50mm diameter copper wire and a power supply capable of passing 17A through the wire.
    What magnetic field strength would you obtain inside a 2.0cm diameter solenoid with the wire spaced as closely as possible?

    2. Relevant equations

    3. The attempt at a solution
    I found the number of loops by
    D=.002+2*1*10-3m (diametre plus 2 radi of wire)???
    then n=12/circumfrence =173.6turns (C=pi*D
    then I subbed all the values and got 0.0037T which is wrong
    all help appreciated - I think my problem is in calculating the number of turns??
  2. jcsd
  3. Aug 6, 2010 #2
    The diameter of the wire will effect the pitch (loop density) of the coil, but not the total number of loops. I take it you have the answer to the problem?
    Last edited: Aug 6, 2010
  4. Aug 6, 2010 #3
    Hey, its for an online mastering physics test - - - - using D as .02m I get .00408T but I didnt use the radius at all so I think it may be wrong???
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook