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Subatomic Particles.

  1. Sep 13, 2011 #1
    is their in electrons and protons that they acquire change?
    And what is the charge actually?
    Last edited by a moderator: Sep 13, 2011
  2. jcsd
  3. Sep 13, 2011 #2


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    Your questions are very vague.
  4. Sep 14, 2011 #3
    I want to know the definition of the charge and why do electrons & protons have charge.
  5. Sep 14, 2011 #4


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    I guess the definition depends on what theory you are interested in. If you are working with QM then charge is the conserved quantity corresponding to the U(1) gauge symmetry. If you are working with classical EM then it is probably best defined by the Lorentz force law, however that might be a little circular if you use the Lorentz force law to define the fields also.

    Or in a practical manner (my preference) you could define charge by an experimental procedure for measuring it. E.g. using the SI standard experiment for measuring an Ampere.

    That is part of the definition of an electron. For the proton, it is because it is composed of quarks and having charge is part of the definition of a quark.
  6. Sep 14, 2011 #5


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    Charge is a fundamental property of some particles. This is similar to asking why do electrons and protons have mass. They just do.
  7. Oct 9, 2011 #6
    So, is it a meaningless question?
  8. Oct 9, 2011 #7
    I do not think it is a meaningless question. I think that it is just difficult to answer.
  9. Oct 9, 2011 #8
    Charge is a property of subatomic particles. It defines the energy difference either positive or negative.
  10. Oct 17, 2011 #9
    can we explain this property just like we can explain the properties of light?
  11. Oct 17, 2011 #10


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    What properties of light that can be explained? The existence of E and B field components? It's spin of of 1? It's energy?

  12. Oct 22, 2011 #11
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