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Circular Motion of Charges: a Proton Starting from Rest Travels

question 76

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Circular motion of charges: A proton starting from rest travels through a potential of 1.0 kV and then moves into a uniform 0.040-T magnetic field. What is the radius of the proton's resulting orbit? (mproton = 1.67 × 10-27 kg, e = 1.60 × 10-19C)


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