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Homework Help: Average current by particle moving in circle

  1. Nov 29, 2015 #1
    1. The problem statement, all variables and given/known data
    A particle having charge 8 nC moves in circular orbit with angular speed of 100 π rad/s. Find the average current produced!
    a. 0.2 μA
    b. 0.3 μA
    c. 0.4 μA
    d. 0.5 μA
    e. 0.6 μA

    2. Relevant equations
    Q = I.t

    3. The attempt at a solution
    The equation I can think of is Q = I.t. I don't know how to find t and I also don't know what the use of angular speed in this question.

  2. jcsd
  3. Nov 29, 2015 #2


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    Staff: Mentor

    The particle is traveling in a circle with a given angular frequency. How often does it pass a given point in its "orbit"?
  4. Nov 29, 2015 #3


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    2017 Award

    Staff: Mentor

    At the given angular velocity, how long does the particle need to make one revolution?
    How much charge flows when the particle makes one revolution?
  5. Nov 29, 2015 #4
    I get it. I find the period then it's the time. The answer is C

    Thanks a lot
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