two current carrying wires may attract each other.in absebce of other forces,the wires will move towards each otherincreasing the kinetic energy.does it contradict the face that magnetic force cannot do any work and hence cannot increase he kinetic energy?
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1 Answers
62Work is only zero if the magnetic force is on a free, moving charged particle, not on current in a wire or ferromagnetic atoms bound in another solid.
THe magnetic force, by definition, can only act in a direction perpendicular to the field. If the object is bound within a solid (like an electrons moving through a wire) then this force can become constant in direction.
If the force acts on a single moving particle, the force will act as a centripetal force (perpendicular to direction of motion). Centripetal forces cannot change the speed of an object, so no work is done.
But here the case is different as u can see from this explanation!
