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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 May 2008 04:05:00 IST
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why do only moving charges hav magnetic field associated with them why not static charges?
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10 May 2008 08:59:53 IST
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see cause when charges move magnetic field is produced...
now assume a wire with charges ....its stationery...thus no velocity and hence no current produced...
but when it moves the electrons move either towards positive or away from negative...thus the current is produced and hence magnetic field is also produced...
since there wasnt any current in static wire we cannot say that there was magnetic field...
To make an analogy between wire and a water-pipe, a wire without any current flowing through it is not like an empty pipe. Rather, it's like a pipe that is full of stationary water.
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10 May 2008 09:00:11 IST
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please rate if i am correct
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10 May 2008 09:46:03 IST
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Not a bit is understood
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10 May 2008 13:30:20 IST
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@ a_joshi
wht reason gave is on the preassumption tht the moving charge or as u r explaing current have a magnetic field around it. But i think u have to read the question again.Wht u r assuming is the question.It is asked tht why a moving charge has a magnetic field around it.So, plz... explain tht thing.
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10 May 2008 13:37:19 IST
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moving charges produce magnetic field due to change in flux associated with them
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10 May 2008 19:58:22 IST
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Oh...... Great ....
then can you be generous enough to tell me why there is a flux at all?? And can you explain me what nature has to do with our definitions... definitely..... flux is something that we defined......
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10 May 2008 19:59:43 IST
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And hey..... which flux did you mean?? electric or magnetic or electromagnetic?
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11 May 2008 12:12:27 IST
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moving charges causes the flow of current (I= dq/dt)
from ampers eqn ther is the existence of magnetic field>>>
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