A Beam of Electrons Moving in the +X Direction Encounters

question 5

Multiple Choice

A beam of electrons moving in the +x direction encounters a potential barrier that is 3.42 eV high and 0.78 nm wide.Each electron has a kinetic energy of 3.41 eV and the electrons arrive at the barrier at a rate of 500 electrons/s (500 electrons every second) .What is the average rate in electrons/s at which electrons pass through the barrier?

• A)435 electrons per second
• B)282 electrons per second
• C)225 electrons per second
• D)176 electrons per second
• E)65 electrons per second

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An independent agency of the federal judicial branch in the United States, responsible for developing sentencing policies and guidelines for the federal courts.