A very long straight wire carrying an electric current is perpendicular to the x
ID: 1263688 • Letter: A
Question
A very long straight wire carrying an electric current is perpendicular to the x-y plane. The current has a value of 30.9 A and is directed in the +z (out of the page). At point 'p', the magnetic field B is represented by one of the arrows.
please help me with part B and C
A very long straight wire carrying an electric current is perpendicular to the x-y plane. The current has a value of 30.9 A and is directed in the +z (out of the page). At point 'p', the magnetic field B is represented by one of the arrows. Indicate the direction of the magnetic field at point p. R: The direction of the magnetic field is You are correct. Your receipt no. is 155-3881 Previous Tries Calculate the magnitude of the B-field at p. Calculate the x-component of the B-field at p.Explanation / Answer
Note that the magnetic field due to this wire is
B = uo I / 2 pi r
where r = the distance of P from the wire.
The wire is at (2, 7), and P is at (4,4).
Thus, by distance formula,
r = 3.6056
Thus,
B = 1.71*10^-6 T [ANSWER, PART B]
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The x component of this is
Bx = B(y2 - y1)/r
= 1.43*10^-6 T [ANSWER, PART C]