- #1
PhiowPhi
- 203
- 8
When considering the magnitude of the magnetic field at a certain point (##P##) away from an infinite/finite wire, I can't understand how an infinite wire would generate a stronger magnetic field (##B##) in contrast to a finite wire that has the same dimensions and current applied, at the same point (##P##). I understand how to use the equations, yet I can't fully understand the concept.
Considering the case of an infinite wire:
At the point the magnetic field is point out of the page.
Case of the finite wire:
Where (A) is the current element region of focus.
Why are the different considering the same ##I## and dimensions for the two?
I found from other sources that all the current elements in the wire would contribute to the magnitude at point(##P##) but how is that so? If the magnetic field created by the current element loops around it:
If so, how can regions B,C contribute to point(##P##) for the two wires?
For the finite wire:
Considering the case of an infinite wire:
At the point the magnetic field is point out of the page.
Case of the finite wire:
Where (A) is the current element region of focus.
Why are the different considering the same ##I## and dimensions for the two?
I found from other sources that all the current elements in the wire would contribute to the magnitude at point(##P##) but how is that so? If the magnetic field created by the current element loops around it:
If so, how can regions B,C contribute to point(##P##) for the two wires?
For the finite wire: