How can i find the magnetic field intensity and magnitude in P ? Also around the first wire ?
I hope you can help me and thanks in advance.
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$\begingroup$ Welcome to the PSE community. I remember that you can sum the magnetic fields and that you have a square of measure $a$. $\endgroup$– SebastianoCommented Mar 21, 2021 at 12:49
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$\begingroup$ I think that your question it similar to this: physics.stackexchange.com/questions/550087/… $\endgroup$– SebastianoCommented Mar 21, 2021 at 13:04
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1 Answer
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The magnetic field at point P is 0 because of mutual cancellation of fields by opposite wires. This can be seen easily if you use the screw rule for straight wires.
$$|\vec B_{straight\ wire}|=\frac{\mu_0 I}{2\pi r}$$
where r is perpendicular distance from wire
