A Point Charge Q Moves on the X-Axis in the Positive

question 13

Multiple Choice

A point charge Q moves on the x-axis in the positive direction with a speed of 370 m/s. A point P is on the y-axis at y = +80 mm. The magnetic field produced at point P, as the charge moves through the origin, is equal to -0.80 μT . When the charge is at x = +40 mm, what is the magnitude of the magnetic field at point P? (μ0 = 4π × 10^-7 T ∙ m/A)

• A) 0.57 μT
• B) 0.74 μT
• C) 0.92 μT
• D) 1.1 μT
• E) 1.3 μT

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