If an electron moves in a magnetic field, it always feels a force. it only feels

Question

If an electron moves in a magnetic field,

it always feels a force.

it only feels a force if its velocity vector is parallel (or antiparallel) to the direction of the magnetic field.

it only feels a force if its velocity vector is not parallel (or antiparallel) to the direction of the magnetic field.

it does not feel a force if it is in motion, only if stationary.

it always feels a force.

it only feels a force if its velocity vector is parallel (or antiparallel) to the direction of the magnetic field.

it only feels a force if its velocity vector is not parallel (or antiparallel) to the direction of the magnetic field.

it does not feel a force if it is in motion, only if stationary.

Explanation / Answer

here,

the force on electron , F = q * v X B = q * v * b * sn(theta)

so, for electron to be parallel or antiparallel to the feild , theta = 0 degree or 180 degree

then F = 0 N

so,

If an electron moves in a magnetic field,

it only feels a force if its velocity vector is not parallel (or antiparallel) to the direction of the magnetic field.

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