1. Limited time only! Sign up for a free 30min personal 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!

Difference between F=qE and F=q(V*B)

  1. Mar 10, 2010 #1
    what is the difference between these two forces ?

    F=qE and F=q(V*B)
     
  2. jcsd
  3. Mar 10, 2010 #2
    The former is the expression for the electric force acting on an object of charge q placed in an electric field of field strength E, while the latter is the expression for the magnetic force acting on an object possessing charge q moving with velocity v in the region of a magnetic field with field strength B.
     
  4. Mar 10, 2010 #3
    The first is just a vector relation for a charge in an electric field. The second is the Lorentz force on a moving charged particle in a magnetic field. The latter equation is a vector cross product, meaning that F is perpendicular to both the velocity vector and the magnetic field vector.

    Bob S
     
  5. Mar 10, 2010 #4
    thanks alot..tomorrow is my exam and i wanted to study about these forces and their differences :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook