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(Solved): 2. A positive charge is moving with a velocity initially along the side of a wire with current flow ...
2. A positive charge is moving with a velocity initially along the side of a wire with current flowing to the right, as pictured below. Draw an arrow on the charge which represents the force it will feel.
The magnetic field lines of the infinite wire are circular and centered at the wire and they are identical in every plane perpendicular to the wire. Since the field decreases with distance from the wire, the spacing of the field lines must increase correspondingly with distance. The direction of this magnetic field may be found with a second form of the right-hand rule . If you hold the wire with your right hand so that your thumb points along the current, then your fingers wrap around the wire in the same sense as .