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!

Question 3

  1. Feb 4, 2005 #1
    Question 4

    What is the charge q_1?

    What is the charge q_2?

    What is the charge q_3?

    Unsure of which equation to use, and the equations that I am looking at involve integration.

    Φ = integral (E * dA) = EA sphere

    Φ = q / ε

    Can someone teach me how to do this problem?
     

    Attached Files:

    Last edited: Feb 4, 2005
  2. jcsd
  3. Feb 4, 2005 #2

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    HINT:Use the property of the electric flux (which is a scalar) of adding wrt the same surface.You'll have to solve a very simple system of equations...

    Daniel.
     
  4. Feb 4, 2005 #3
    Property of Electric Flux = EA cos theta? But there is no theta. Unsure of the area and of the E.
     
  5. Feb 4, 2005 #4

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    No.Let be [itex] \Phi_{1} [/itex] the electric flux generated by a charge [itex] q_{1} [/itex] through the (closed) surface S.Similar [itex] \Phi_{2} [/itex] for q_{2} [/itex].Then the total flux is simply the sum of Phi's which,due to the same denominator (epsilon),translates to the charges...

    Daniel.
     
  6. Feb 4, 2005 #5
    So what is the charge of q_1, q_2, and q_3?

    -q/E + (-2q/E) + 3q/E = 0/E = 0

    The charge of each is 0?
     
  7. Feb 4, 2005 #6

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    No,you have to write equations of the type phi_{1}+phi_{2}=phi_{tot} for all 3 surfaces & will end up with an algebraic system of 3 eqn. with 3 unknowns,namely the charges.

    Daniel.
     
  8. Feb 4, 2005 #7
    Okay, got it. The answers are 2q, q, -3q. Am I correct?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Question 3
  1. 3 questions. (Replies: 1)

  2. Question 3 (Replies: 5)

  3. 3 questions (Replies: 1)

  4. Matrices Question 3 (Replies: 2)

Loading...