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!

Magnetism (determining the magnetic field)

  1. May 11, 2010 #1
    I just need help on how to solve these problems. I am so confused with the directions that i just don't get it...

    1) A long straight wire is aligned north-south and carries current in the northerly direction. What is the direction of the magnetic field created directly abvove the wire?
    Answer: East

    2) What is the direction of the magnetic field created immediately to the left of the wire?
    a. Downward
    b. south
    c. east
    d. west
    e. upward
    f. north

    3) If a proton is traveling north directly above the wire, what is the direction of the magnetic force on the proton due to the wire?
    a. upward
    b. south
    c. downward
    d. north
    e. west
    f. east

    I just need an explanation on why, and how to do this? I know it's the right hand rule, but i dont' get the questions that are asking the placement, for example number 2 says to the left of the wire? what does that mean? and like number 1 says above the wire? what does that mean?
    how do i go about this?

    any help is greatly appreciated. thanks!
     
  2. jcsd
  3. May 11, 2010 #2
    Just draw the wire and set up a coordinate system. You know the wire goes N and S so you can label that. From those you can label E and W as well. Then "above the wire" is just above the plane of the wire or above sheet of paper.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Magnetism (determining the magnetic field)
Loading...