A +7.00-μC point charge is moving at a constant 8.50×106 m/s in the +y-direction, relative to a reference frame. At the instant when the point charge is at the origin of this reference frame, find the magnetic-field vector B⃗ it produces at the following points.

The points are:

(a) x = 0.500 m, y = 0, z = 0 (b) x = 0, y = 0, z = +0.500 m

a)

b)

Explanation:

The magnetic field can be calculated as follows:

a) The velocity vector is in +y direction and the point is on x-axis

Because ,

b) The velocity vector is in +y direction and the point is on z-axis

Because ,

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