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Electric field strength between charged plates

  1. Aug 3, 2017 #1
    1. The problem statement, all variables and given/known data
    Screen Shot 2017-08-03 at 8.31.03 pm.png
    2. Relevant equations


    3. The attempt at a solution
    E=kq/d2

    how do I involve the kinetic energy K in the equation?
     
  2. jcsd
  3. Aug 3, 2017 #2
    What is the relationship between potential difference between the plates and electric field between the plates ?

    How do you relate potential difference and electric potential energy ?

    Think in terms of conservation of energy .

    OR

    Use Dimensional Analysis
     
  4. Aug 3, 2017 #3
    Electric potential energy = qV= kqQ/d

    Is this equal to the kinetic energy K?
     
  5. Aug 3, 2017 #4
    No , this is for a point charge .
     
  6. Aug 3, 2017 #5
    Sorry, that's the only formula I know. Can you please tell me? Thank you!
     
  7. Aug 3, 2017 #6
    If the electric field between the charged plates is E , what will be the force on the charged partice +q ?
     
  8. Aug 3, 2017 #7
    F=Eq
     
  9. Aug 3, 2017 #8
    Now if charged particle moves from positive plate to negative , how much is the work done on the particle by the electric force ?
     
  10. Aug 3, 2017 #9
    W=Eqd
     
  11. Aug 3, 2017 #10
    Now what does Work Kinetic Energy theorem say ?
     
  12. Aug 3, 2017 #11
    work done equals to change in KE

    so Eqd=K

    E=K/qd
     
  13. Aug 3, 2017 #12
    Yes :smile:
     
  14. Aug 3, 2017 #13
    Thank you so much~
     
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