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!

Force on an electron from a magnetic field

  1. Jun 23, 2008 #1
    1. The problem statement, all variables and given/known data
    A 17.0 g block with a charge of +1.30 10-4 C is placed in an electric field e vector = (2000 i hat - 200 j hat) N/C.
    (a) What is the electrostatic force on the block?
    the force is 2.61E-1N but I am having trouble finding the angle.

    2. Relevant equations

    3. The attempt at a solution
    180+tan^-1(-200/2000)=174.3 degrees but webassign said it was wrong.
    Last edited: Jun 23, 2008
  2. jcsd
  3. Jun 23, 2008 #2
    sorry the title should have said force on an electron from an elecrtic field
  4. Jun 23, 2008 #3
    You might try writing only tan^-1 part (so you get like 6 degrees) and test this solution. Or use 90 instead of 180 deg... some diagram which angle are you looking for would be helpful.
  5. Jun 23, 2008 #4
    I am looking for the angle made by F and the positive x axis
  6. Jun 23, 2008 #5
    F is in the opposite direction of E right?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?