In a Certain Particle Accelerator,a Current of 300 $\mu$ A Is Carried by a 4

question 40

Multiple Choice

In a certain particle accelerator,a current of 300 $\mu$ A 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 $\times$ 10^-27 kg.What is the number of protons per unit volume in this beam?

• A)3.64 \(\times\) 10¹³ protons/m³
• B)2.76 \(\times\) 10¹³ protons/m³
• C)1.27 \(\times\) 10¹³ protons/m³
• D)5.98 \(\times\) 10¹³ protons/m³
• E)4.17 \(\times\) 10¹³ protons/m³

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