Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Field direction and magnitude

  1. Mar 8, 2008 #1
    how do i find the field direction and magnitude of a horizontal copper wire with a current moving East. length is 1.0m, diameter is .10cm, current is 50 A. the wire is being levitated.
  2. jcsd
  3. Mar 8, 2008 #2


    User Avatar

    Use F=ILXB=mg.
  4. Mar 9, 2008 #3
    field direction and magntiude

    could you polease expand on the formula. what numbers do i plug in for mg?
  5. Mar 9, 2008 #4
    m - mass of the wire
    g - 9.81N/Kg. The force which a 1Kg mass exerts due to gravity.
  6. Mar 9, 2008 #5


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    The important thing isn't knowing which numbers to plug in where, it's understanding the principles behind the equation and where the equation comes from. Do you understand where the equation comes from?
    Last edited: Mar 9, 2008
  7. Mar 9, 2008 #6
    how do i set up the formula to get the answer?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook