In a Certain Particle Accelerator, a Current of 300 μA

question 12

Multiple Choice

In a certain particle accelerator, a current of 300 μA is carried by a 4.00-MeV proton beam that has a radius of 1.30 mm. The mass of a proton is 1.67 × 10^-27 kg. If the beam hits a target, how many protons hit the target in 3 s?

• A) 1.55 × 10¹⁵
• B) 8.64 × 10¹⁵
• C) 3.42 × 10¹⁵
• D) 4.29 × 10¹⁵
• E) None of these is correct.

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