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!

Whats the average current does this rotating charge represent

  1. Feb 25, 2009 #1
    1. The problem statement, all variables and given/known data

    a small sphere carries a charge of 8.34nC in whirled in a circle at the end of an insulating string. The angular speed is 116 Pi rad/s. whats the average current does this rotating charge represent

    2. Relevant equations

    I= q/t
    w= theta/t

    3. The attempt at a solution
    116 pi rad/sec * 1 rev/min
     
  2. jcsd
  3. Feb 25, 2009 #2

    LowlyPion

    User Avatar
    Homework Helper

    Re: Ch17-18

    What is current?

    What units are you asked to represent it in?

    It might be useful to figure how many times the charge will pass a particular point a sec.

    They give you that it revolves at 116π radians/sec so how many times a sec ?
     
  4. Feb 25, 2009 #3
    Re: Ch17-18

    Current is I (amps) where its charge(Q) / (t) times in secs. so 116/60?, is it 8.34x1e-9/ (116 pi/60)?
     
  5. Feb 25, 2009 #4

    LowlyPion

    User Avatar
    Homework Helper

    Re: Ch17-18

    1. How many radians in a revolution?

    2. What's with the 60, when they give you ω in radians/sec already?
     
  6. Feb 25, 2009 #5
    Re: Ch17-18

    116 pi rad/ sec * 60secs/1 min* 1rev/2pi rad
     
  7. Feb 25, 2009 #6

    LowlyPion

    User Avatar
    Homework Helper

    Re: Ch17-18

    Why do you want it in radians/minute when current is in amps which are Coulombs/s?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Whats the average current does this rotating charge represent
Loading...