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(B) The magnetic field produced by a circular current-carrying loop along its axis is directed along the axis itself.Since the electron is projected a

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no force.

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(B) The magnetic field produced by a circular current-carrying loop along its axis is directed along the axis itself.Since the electron is projected along the axis,its velocity vector $\vec{v}$ is parallel or antiparallel to the magnetic field vector $\vec{B}$.The magnetic force on a moving charge is given by $\vec{F} = q(\vec{v} 	imes \vec{B})$,which has a magnitude $F = qvB \sin 	heta$.Here,the angle $	heta$ between the velocity and the magnetic field is $0^{\circ}$ or $180^{\circ}$.Since $\sin(0^{\circ}) = 0$ and $\sin(180^{\circ}) = 0$,the magnetic force $F = 0$.Therefore,the electron experiences no force.

An electron is projected along the axis of a circular conductor carrying current $I$. The electron will experience:

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