An -particle (charge

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

An α\alpha-particle (charge +2e+2e, mass 6.65×10−27 kg6.65\times10^{-27}\,\text{kg}) is accelerated in a cyclotron. The potential difference between the dees is 500 V500\,\text{V}, and the particle gains energy each time it crosses the gap. Approximately how many complete revolutions must the particle make to reach a kinetic energy of 2.0 MeV2.0\,\text{MeV}? (a) 500500 (b) 40004000 (c) 10001000 (d) 20002000

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