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!

Electromagnet investigation lab assignment

  1. Jul 18, 2011 #1
    1. The problem statement, all variables and given/known data

    An alpha particle enters a uniform verical magnetic field of 1.0 T with a velocity of 2.0m/s East.
    a) Find the force exerted on the particle by the field.
    b) Find the acceleration of the particle.
    c) Find the radius of curvature of the path of the particle.

    2. Relevant equations

    F= QvB ???

    3. The attempt at a solution
    B= 1.0 T
    v= 2.0m/s
    How do I solve it without given Q???
     
  2. jcsd
  3. Jul 18, 2011 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    What do you know about an alpha particle ?
     
  4. Jul 18, 2011 #3
    Oh..I just googled it :S but does it have a charge of 3.2 x 10^-19 Coulombs? so would that just be my Q and plug that into the equation of F= QvB?
     
  5. Jul 18, 2011 #4

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Yes, an alpha particle is composed of two protons and two neutrons. The charge of a proton is 1.6*10-19 Coulombs .

    Force is a vector quantity, so presumably it should also have a direction associated with it.
     
  6. Jul 18, 2011 #5
    Ok. Thanks! :)
    and to find the radius, do i use the equation: a= v^2/r ?
     
  7. Jul 19, 2011 #6
    To find radius ... the magnetic force will act as centripetal force (mv2/r)...
     
  8. Jul 19, 2011 #7

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Yes. That should work. Also, cupid's idea is equally good.
     
  9. Jul 20, 2011 #8
    :biggrin: :biggrin: :biggrin: :biggrin:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Electromagnet investigation lab assignment
Loading...