20.1 Magnetic Fields, Field Lines, and Force
The maximum force a charge can experience is when it moves perpendicular to the magnetic field, because θ = 90° θ = 90° and sin 90° = 1. sin 90° = 1. Figure 20.16 (a) A proton moves through a uniform magnetic field. (b) Using the right-hand rule, the force on the proton is found to be directed into the page.
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