The constant stream of high speed electrons emerging from an "electron gun" were accelerated from rest by the applied voltage across parallel plates as shown in the diagram. (a) If the beam current is 0.24 A, how many electrons emerge from the aperture of the gun each second? electrons/second AN At (b) How fast are the electrons moving if the beam contains 1.5 x 10¹2 electrons/m? d. J aperture applied voltage 。>
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