Question: The electron beam emerging from a certain high-energy electron accelerator has a circular cross section of radius 1.00 mm. (a) The beam current is 8.00

The electron beam emerging from a certain high-energy electron accelerator has a circular cross section of radius 1.00 mm.
(a) The beam current is 8.00 /A. Find the current density in the beam, assuming that it is uniform throughout.
(b) The speed of the electrons is so close to the speed of light that their speed can be taken as c = 3.00 = 108 m/s with negligible error. Find the electron density in the beam.
(c) How long does it take for Avogadro’s number of electrons to emerge from the accelerator?

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