Two 2.3-cm-diameter-disks spaced 1.6 mm apart form a parallel-plate capacitor. The electric field between the disks is 4.3×105 V/m .
What is the voltage across the capacitor?
How much charge is on each disk?
An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.5×107 m/s. What was the electron's speed as it left the negative plate?
