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

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 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