Alpha Particles,each Having a Charge of +2e and a Mass

question 75

Multiple Choice

Alpha particles,each having a charge of +2e and a mass of 6.64 × 10^-27 kg,are accelerated in a uniform
Magnetic field to a final orbit radius of
The field is perpendicular to the velocity of the particles.What is the kinetic energy of an alpha particle in the final orbit? (1 eV = 1.60 × 10^-19 J,

• A)3.0 MeV
• B)2.6 MeV
• C)3.4 MeV
• D)3.9 MeV
• E)4.3 MeV

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