Which one of the following statements concerning the magnetic force on a charged

Question

Which one of the following statements concerning the magnetic force on a charged particle in a magnetic field is true?

The magnetic force is zero if the particle moves perpendicular to the field.

The magnetic force is a maximum if the particle is stationary.

The magnetic force depends on the component of the particle's velocity that is perpendicular to the field.

The magnetic force acts in the direction of motion for a positively charged particle.

The magnetic force is a maximum if the particle moves parallel to the field.

Explanation / Answer

here,

the magnetic force on a charged particle is F = q * ( v X B)

q = charge

v = speed of particle

B = magnetic feild

so,

The magnetic force depends on the component of the particle's velocity that is perpendicular to the field.

as for the cross product

the perpendicular component of the magnetic feild is used

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