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A point charge Q moves on the x-axis in the positive direction with a speed of...

A point charge Q moves on the x-axis in the positive direction with a speed of 480 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 -0.5 μT k^. When the charge is at x = +30 mm, what is the magnitude of the magnetic field at point P? (μ0 = 4π × 10-7 T · m/A)

a. The correct answer is not listed

b. zero

c. 6.1 μT

d. 0.57 μT

e. 0.92 μT

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