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07:08
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Q: Why current density in a condutor of uniform cross sectional area be constant at all points?

TonyPhysicsloverAccording to what I was taught, if current was dispersed "uniformly," current density would remain constant. So, in a conductor, the 'current density should be the same at all points.' But, given that electrons flow at random (their time between collisions differs from that of other electrons), h...

Need Help with this !
07:24
Good afternoon @JohnRennie
 
2 hours later…
09:52
@JohnRennie, Hi John:), that is a divulgative article, I hope you trust me to be able to faithfully copy a quote a
and that you trust EB
please let me know anyhow if my EB argument is enough to refute Einstein problem and also how the two phenomena are called and, possibly, two links to expand on the issue
I'll catch up with you when I cam, I have lots of problems. Thanks, bye
""...!9..a wire moving through a magnetic field will have a current induced in it, but according to the contemporary understanding, there was one theory that covered the case of the magnet moving and the wire at rest, whereas 2) there was a wholly different theory for the case where the magnet was at rest and the wire moved""
 
4 hours later…
14:09
Hello everyone , I have a v important question. I am sure all of you + me love mathematics a lot. I am studying for engineering. So , count physics , computer science into it too. Now , I really do love my subjects. They give me the ability to create sth , I just like it at times to do it. I have my goals as to what goals I want to achieve through studying them. One being creating a rocket ship.
My Q is that there are times while studying that u don’t feel like working , learning that subject at the moment. U feel like doing sth else. I don’t understand this part here. If was work , study i

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