A Charge Is Accelerated from Rest Through a Potential Difference

question 21

Multiple Choice

A charge is accelerated from rest through a potential difference V and then enters a uniform magnetic field oriented perpendicular to its path. The field deflects the particle into a circular arc of radius R. If the accelerating potential is tripled to 3V, what will be the radius of the circular arc?

• A) 9R
• B) 3R
• C) R
• D) R/
• E) R/9

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