If a charged particle of charge q� is travelling with a velocity v� in a magnetic field B,�, then the force that that charged particle feels is given by F=qv×B.�=��×�. In this case, the force F� is also a vector quantity, since it has both a magnitude and a direction. So the cross product plays an important role in physics and engineering. Now suppose that a proton with some positive charge q� is traveling in the xy��-plane with a velocity in the direction of the vector v=⎛⎝⎜3−20⎞⎠⎟�=(3−20) and that the magnetic field B� is a uniform field pointing straight up in the z� direction, perpendicular to the xy��-plane. Then the direction of the force that the moving proton feels is in the direction
If a charged particle of charge q� is travelling with a velocity v� in a magnetic field B,�, then the force that that charged particle feels is given by
F=qv×B.�=��×�.
In this case, the force F� is also a
Now suppose that a proton with some positive charge q� is traveling in the xy��-plane with a velocity in the direction of the vector v=⎛⎝⎜3−20⎞⎠⎟�=(3−20) and that the magnetic field B� is a uniform field pointing straight up in the z� direction, perpendicular to the xy��-plane. Then the direction of the force that the moving proton feels is in the direction
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