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There's a solution for the version of this that doesn't have the charge moving through the...

There's a solution for the version of this that doesn't have the charge moving through the origin, but this charge being at x=40mm seems to complicate things. Does anyone understand the underlying concepts for this?

A point charge Q moves on the x-axis in the positive direction with a speed of 360 m/s. A point P is on the y-axis at y = +60 mm. The magnetic field produced at point P, as the charge moves through the origin, is equal to -0.7 μT k^. When the charge is at x = +40 mm, what is the magnitude of the magnetic field at point P? (μ 0 = 4π × 10-7 T · m/A)

0.65 μT
0.40 μT
0.89 μT
0.52 μT
0.77 μT
science   Advanced-Physics   
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