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Charge of blackole

  1. Dec 8, 2008 #1
    How to find the charge of black hole?
    Does charge depends on the mass of black hole?
  2. jcsd
  3. Dec 8, 2008 #2

    Jonathan Scott

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    Gold Member

    The electric charge of a black hole is simply the sum of the electric charge that was on whatever matter formed it. It is independent from the mass. From a distance, it gives rise to the same sort of electrostatic field as ordinary charged material would at the same location. If a black hole had a very large excess electric charge of either sign, that would tend to make it attract matter with the opposite charge more strongly than matter with the same charge, which would tend to neutralize the excess charge.
  4. Dec 9, 2008 #3
    Thanks for the info...Is this neutralization process happens only in black holes Or it happens in all e.g. stars,ordinary objects?
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