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magnetic forces and magnetic fields

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Source : www.physics.wisc.edu | Size : 201266

. test charge is placed in a magnetic field so that its velocity vector has a component . If it were possible for magnetic field lines to .

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REASONING AND SOLUTION Magnetic field lines, like electric field lines, never intersect.When a moving test charge is placed in a magnetic field so that its velocity vector has a componentperpendicular to the field, the particle will experience a force. That force is perpendicular to both thedirection of the field and the direction of the velocity. If it were possible for magnetic field lines tointersect, then there would be a different force associated with each of the two intersecting field lines;the particle could be pushed in two directions. Since the force on a particle always has a uniquedirection, we can conclude that magnetic field lines can never cross.

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