Question

How much charge is on each disk? Two 2.5-cm-diameter-disks spaced 1.7 mm apart Express your answers in coulombs separated by a comma. form a parallel-plate capacitor. The electric field between the disks is 4.2×10^5V/m. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. X Incorrect; Try Again; 14 attempts remaining Part C An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.1×10^7

m/s. What was the electron's speed as it left the negative plate? Express your answer with the appropriate units.

Answer 1

Part (a) The charge in on each disk is 4.3×10^-6 C

Part (b) The electron's speed as it left the negative plate was 4.2×10^7 m/s

The electrons speed as it left the negative plate can be found using the formula

v = v0 + at

Where v0 = 0 because the electron has been at rest before it leaves the disk, and t is the amount of time it takes for the electron to leave the disk. This time would be calculated as 0.0043 ns