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The electron beam emerging from a certain high-energy electron accelerator has a circular cross section of radius 1.05 mm. (a) The beam current is 7.65 μA. Find the current density in the beam assuming it is uniform throughout. A/m2 (b) The speed of the electrons is so close to the speed of light that their speed can be taken as 300 Mm/s with negligible error. Find the electron density in the beam. m−3 (c) Over what time interval does Avogadro's number of electrons emerge from the accelerator? s

The electron beam emerging from a certain high-energy electron accelerator has a circular cross section of radius 1.05 mm. (a) The beam current is 7.65 μA. Find the current density in the beam assuming it is uniform throughout. A/m2 (b) The speed of the electrons is so close to the speed of light that their speed can be taken as 300 Mm/s with negligible error. Find the electron density in the beam. m−3 (c) Over what time interval does Avogadro's number of electrons emerge from the accelerator? s

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The electron beam emerging from a certain high-energy electron accelerator has a circular cross section of radius 1.05 m m . (a) The beam current is 7.65 μ A . Find the current density in the beam assuming it is uniform throughout. ◻ A / m 2 (b) The speed of the electrons is so close to the speed of light that their speed can be taken as 300 M m / s with negligible error. Find the electron density in the beam. m − 3 (c) Over what time interval does Avogadro's number of electrons emerge from the accelerator? ◻ s

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