Alpha Particles (Charge = +2e,mass = 6

question 32

Multiple Choice

Alpha particles (charge = +2e,mass = 6.68 × 10^-27 kg) are accelerated in a cyclotron to a final orbit radius of 0.30 m.The magnetic field in the cyclotron is 0.80 T.The period of circular motion of the alpha particles is closest to:

• A)0.16 μs
• B)0.25 μs
• C)0.33 μs
• D)0.40 μs
• E)0.49 μs

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