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Homework Help: Electomagnetism help!

  1. Nov 12, 2008 #1
    1. Suppose a 1.0-g nugget of pure gold has zero net charge. What would be its net charge after it has 1.0% of its electrons removed?
    please help! i don't know what to do
  2. jcsd
  3. Nov 12, 2008 #2
    1. Find the mass of a gold atom from a table.
    2. Obtain the number of gold atoms. i.e. (# of atoms) = 1.0g / (mass of a gold atom)
    3. (# of electrons) = (# of gold atoms) x (atomic number of gold)

    I guess this is enough for the hint?
  4. Nov 12, 2008 #3
    after obtaining the electrons, i will get the 1% of electrons removed then ill add the electrons and protons to obtain the net charge? am i correct?
  5. Feb 16, 2010 #4
    A very long cylinder of radius R, carries a uniform polarisationP perpendicular to it's axis.Find the electric field in side the cylinder. Show that the field outside the cylinder can be expressed in the form
    E=Rsquared divided
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