A Proton and an Alpha Particle Are Travelling Perpendicular to a Magnetic

question 72

Multiple Choice

A proton and an alpha particle are travelling perpendicular to a magnetic field and make circular orbits or the same radius.The ratio of their speeds v_proton/v_alpha is

• A)0.5.
• B)1.
• C)2.
• D)4.
• E)0.25.

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