1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    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 Problem

  1. Sep 29, 2006 #1
    (a) How many turns of wire would be on a solenoid carrying a current 4.9 A if the solenoid is 20 cm in diameter, 248 cm long, and the field at the center is 3.3 × 10-3 T?

    The magnetic field of a solenoid is the permeability of free space times the number of turns per unit length times the current.

    Now How do i find the Number of turns per unit length, Is it Length/Diameter * The field of Center? Thanks
    and i know n = N/L so how do i find that
    Last edited: Sep 29, 2006
  2. jcsd
  3. Sep 29, 2006 #2
    Okay so Basically i tried to use N = 2RB/ (uoI) to get the answer but that does not work
  4. Sep 29, 2006 #3

    Chi Meson

    User Avatar
    Science Advisor
    Homework Helper

    The diameter of a long solenoid does not matter. The magnetic field (ideally) is B=(uo)nI . Solve for n .
  5. Sep 29, 2006 #4
    thanks alot
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Solenoid Problem