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(D) The magnetic field $\overrightarrow{B}$ produced by a circular current-carrying coil is directed along its axis at all points on the axis.Since th

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No force experienced

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(D) The magnetic field $\overrightarrow{B}$ produced by a circular current-carrying coil is directed along its axis at all points on the axis.Since the electron is projected along the axis,its velocity vector $\overrightarrow{v}$ is parallel to the magnetic field vector $\overrightarrow{B}$.The magnetic force on a moving charge is given by $\overrightarrow{F} = q(\overrightarrow{v} 	imes \overrightarrow{B})$.Since $\overrightarrow{v}$ and $\overrightarrow{B}$ are parallel,the angle $	heta$ between them is $0^o$ or $180^o$.Therefore,$\overrightarrow{F} = qvB \sin(	heta) = qvB \sin(0^o) = 0$.Thus,the electron experiences no force.

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

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