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

question 30

Multiple Choice

A point charge Q moves on the x-axis in the positive direction with a speed of 280 m/s. A point P is on the y-axis at y = +70 mm. The magnetic field produced at the point P, as the charge moves through the origin, is equal to -0.30 μT . What is the charge Q? (μ0 = 4π × 10^-7 T ∙ m/A)

• A) -53 μC
• B) +53 μC
• C) -39 μC
• D) +39 μC
• E) +26 μC

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