Electron Beam #

Question Text#

An electron beam with a radius of 0.87 $\text{mm}$ has a measured current of 129$\mu \mathrm{A}$. What is the magnitude of the current density in the beam?

Answer Section#

Please enter in a numeric value in $A/m^2$ .

Attribution#

Problem is licensed under the CC-BY-NC-SA 4.0 license.