1. Limited time only! Sign up for a free 30min personal 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!

Maximum charge

  1. Jun 25, 2005 #1
    Me again.

    Is there a formula for the maximum amount of charge may be stored on a body (assume spherical) of radius r? I assume radius is the only factor, though mass is known also. I just don't remember seeing anything for this and can't find it in all my books for the life of me.

  2. jcsd
  3. Jun 26, 2005 #2
    Lets try ::
    Capacitance:: C=[tex]4 \pi \epsilon r[/tex]
    [tex]Q=4 \pi \epsilon r V[/tex]
    Now V should be less than E0 Breakdown Voltage
    so max can be
    [tex]Q_{max} = 4 \pi \epsilon r E_0 [/tex]
    Well I am not too sure abt above but its a try , if u can provide some other logic it will be welcomed
  4. Jun 26, 2005 #3
    Dammit, sorry I was being dumb. I didn't notice we were given the electrical breakdown of air in the problem, so I know the maxmum electric field, I know the radius, and from this I can easily get the charge:

    Q = [tex]4 \pi \epsilon r^2[/tex]E(r)

    Apologies for wasting thine time, and thanks for posting back. I was pretty tired. :zzz: Take care.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Maximum charge
  1. Maximum charge (Replies: 5)