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**[SOLVED] lorentz force**

**1. Homework Statement**

Say you a magnetic field perpendicular to the direction of a current. If you consider the current as electrons moving forward then the Lorentz force on the electrons points up (say). But if you consider the current is a lot of positive charge carriers moving backward, then the Lorentz force on the positive charges points up also because the sign of the cross-product and the sign of the charge changes. That makes ABSOLUTELY NO SENSE TO ME because how can the positive charge carriers and the electrons both move up?

**2. Homework Equations**

**3. The Attempt at a Solution**