An electric charge in a magnetic field will experience no force if the charge is moving to the field.
perpendicular
parallel

Parallel

Explanation:

An electric charge in a magnetic field will experience no force if the charge is moving parallel to the field.

No force is exerted on electric charge when it moves parallel to magnetic field.

Parallel

Explanation:

When the electric charge moves parallel in a magnetic field, the component of velocity and field becomes zero which results in net force as zero.

This due to the sine component which makes zero angle and thus component as zero too. The force on the charge moving in magnetic field is perpendicular to velocity and field.

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