Physics Help Forum Charge moves relative to charge: one thing two aspects?

 Apr 16th 2019, 12:52 AM #1 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 666 Charge moves relative to charge: one thing two aspects? 1. Two neutral balls move relative to each other (one thing). When the frame of reference is established on the left ball, the right ball is moving (one aspect). When the frame of reference is established on the right ball , the left ball is moving (another aspect). In respect of electromagnetism, these two aspects are the same, results are both nothing. 2. Because conservation of charges, here construct a simplest system: a proton on the left side and an electron on the right side. Two charges move relative to each other (one thing). When the frame of reference is established on the proton, the electron is moving (one aspect). When the frame of reference is established on the eletron, the the proton is moving (another aspect). In respect of electromagnetism, are these two aspects different? In another word: an electron moving relative to a proton or a proton moving relative to an electon are different events logically? What's the result?
 Apr 16th 2019, 09:27 AM #2 Senior Member   Join Date: Aug 2010 Posts: 434 "Gallilean relativity", due to Gallileo, says that the result of calculations of moving objects do not depend upon the frame of reference- no mechanical experiment can determine an "absolute" velocity. Maxwell's equations, in particular that a moving charge has a magnetic field, seemed to imply that electro-magnetic experiments could determine an "absolute" velocity. Einstein's theory of relativity solved that problem- no such experiment can determine an "absolute" velocity. So the answer to your question is "no". There is no difference between the two scenarios. topsquark and studiot like this.
 Apr 16th 2019, 04:35 PM #3 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 666 Suppose the distance between the two charges is increasing. Then, what the electron experiences is electric potential decreasing, what the proton experiences is electric potential increasing. Logically, they seem to be different events?
Apr 16th 2019, 07:24 PM   #4

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,856
 Originally Posted by neila9876 Suppose the distance between the two charges is increasing. Then, what the electron experiences is electric potential decreasing, what the proton experiences is electric potential increasing. Logically, they seem to be different events?
I suppose it might seem reasonable to suggest that the two particles would experience different changes to the electric potential, but in actuality the magnitudes of the potentials are the same so the two particles react the same.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.

 Apr 17th 2019, 01:39 AM #5 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 666 Actually, what you are talking about seems to be "one thing two aspects"?

 Tags aspects, charge, moves, relative, thing

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post PAMD1958 Nuclear and Particle Physics 0 Aug 13th 2013 09:42 AM chevy900ss Electricity and Magnetism 12 Mar 17th 2010 07:09 PM dspaulding09 Electricity and Magnetism 1 Feb 24th 2010 06:59 PM particlejohn Electricity and Magnetism 1 Jun 12th 2008 05:01 PM werehk Electricity and Magnetism 1 Jun 1st 2008 04:51 AM