At the Fermilab Accelerator in Weston,Illinois,singly-Charged Ions with Momentum 4

question 18

Multiple Choice

At the Fermilab accelerator in Weston,Illinois,singly-charged ions with momentum 4.8 x 10^-16 kg*m/s are held in a circular orbit of radius 1 km by an upward magnetic field.What B-field must be used to maintain the ions in this orbit? (q_ion = 1.6 x 10^-19 C)

• A)1 T
• B)2 T
• C)3 T
• D)4 T

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