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(B) The magnetic field $\vec{B}$ produced by a long straight wire carrying current $I$ is directed into the plane of the paper (using the right-hand t

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towards the wire

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(B) The magnetic field $\vec{B}$ produced by a long straight wire carrying current $I$ is directed into the plane of the paper (using the right-hand thumb rule).The magnetic Lorentz force on a charge $q$ moving with velocity $\vec{v}$ is given by $\vec{F} = q(\vec{v} 	imes \vec{B})$.For a negative charge $(q According to the right-hand rule for the cross product,if the charge is moving towards the wire,the direction of $(\vec{v} 	imes \vec{B})$ is parallel to the current. Since the charge is negative,the force $\vec{F} = q(\vec{v} 	imes \vec{B})$ will be directed opposite to this,which would not match the problem statement. However,if the charge is moving towards the wire,the force direction is determined by the cross product. Given the force is parallel to the current,the velocity vector must be directed towards the wire for a negative charge to experience a force in the direction of the current.

$A$ negative test charge is moving near a long straight wire carrying a current. The force acting on the test charge is parallel to the direction of the current. The motion of the charge is

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