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The current of an electron beam has a measured current of I = 50.00 μA with a radius of 1.00 mm. What is the magnitude of the current density of the beam? 30.55 A/m^2 25.55 A/m^2 20.92 A/m^2 15.92 A/m^2

The current of an electron beam has a measured current of I = 50.00 μA with a radius of 1.00 mm. What is the magnitude of the current density of the beam? 30.55 A/m^2 25.55 A/m^2 20.92 A/m^2 15.92 A/m^2

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The current of an electron beam has a measured current of I = 50.00 μ A with a radius of 1.00 m m . What is the magnitude of the current density of the beam? 30.55 A / m ∧ 2 25.55 A / m ∧ 2 20.92 A / m ∧ 2 15.92 A / m ∧ 2

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