Which of the following is an accurate statement? OA) A magnetic field line is, b

Question

Which of the following is an accurate statement? OA) A magnetic field line is, by definition, tangent to the direction of the magnetic force on a moving charge at a O B) The magnetic force on a moving charge does not change its energy O C The magnetic force on a current carrying wire is greatest when the wire is parallel to the magnetic field. o D) A curent clopfwiretdsto ine u withs plane paralel o an external magnetic feld in whidh it s O E) Magnetic field lines have as their sources north and south poles given point in space.

Explanation / Answer

Magnetic force acts perpendicular to velocity of moving charged particle. So this force is only able to change the direction of velocity not the magnitude. So kinetic energy of the charged particle must remain constant if only magnetic force is acting on it, as speed does not change..

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