Two parallel plates having charges of equal magnitude but opposite sign are separated by 12.0 cm. Each plate has a surface charge density of 36.0 nC/m2. A proton is released from rest at the positive plate. Determine (a) the magnitude of the electric field between the plates from the charge density, (b) the potential difference between the plates, (c) the kinetic energy of the proton when it reaches the negative plate, (d) the speed of the proton just before it strikes the negative plate, (e) the acceleration of the proton, and (f) the force on the proton. (g) From the force, find the magnitude of the electric field. (h) How does your value of the electric field compare with that found in part (a)?

Oppositely charged parallel plates are separated by 3.71 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? N/C (b) What is the magnitude of the force on an electron between the plates? (c) How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.00 mm from the positive plate?

Consider the four particles shown, with q1 = –40.0 µC, q2 = –20.0 µC, q3 = 15.0 µC, and q4 = –25 µC. The square has sides of length a = 25.0 cm. a) What is the change in the electric potential energy of the system of the four charges in the configuration shown in the figure if they were originally infinitely far away? b) Charges q3 and q4 are now moved to points A and B, respectively. What is the change in potential energy of the system after these charges are moved? c) What are the magnitude and direction of the electric field at the location of charge q4 due to the other three charges? d) What is the initial acceleration of the charge q4 due to the electric force exterted by the other three charges on q4 if m4 = 40.0 g? e) With what speed is charge q4 (with m4 = 40.0 g) moving when it is infinitely far away from the other charges?   I need help with specifically D and E. Thanks!

A uniform electric field of magnitude 200 V/m is directed in the positive x-direction. A 17 µC charge moves from the origin to the point (x, y) = (20 cm, 50 cm). (a) What was the change in the potential energy of this charge?

A point charge q1 = 4.69 x 10-6 C is held fixed at the origin of a coordinate system. A second charge q2 = -3.16 x 10-6 C is initially at the %3D coordinates (0.149, 0) m and is then moved to the coordinates (0.215, 0) m. What change in potential energy results from moving q2?

A uniform electric field of 2.0×105 N/C is oriented in the negative x direction. How much work must be done to move an electron 3.0 m in the positive x direction, if it begins and ends at rest?

Two large, parallel, conducting plates are 11 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.5 x 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.) (a) Find the electric field at the position of the electron. (b) What is the potential difference in volts between the plates? (a) Number i (b) Number i Units Units

Two large, parallel, conducting plates are 9.5 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 3.8 × 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.) (a) Find the electric field at the position of the electron. (b) What is the potential difference in volts between the plates? (a) Number i (b) Number i Units Units

Oppositely charged parallel plates are separated by 5.09 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? (b) What is the magnitude of the force on an electron between the plates? (c) How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.18 mm from the positive plate?

A particle of charge +7.3 µC is released from rest at the point x = 79 cm on an x axis. The particle begins to move due to the presence of a charge Q that remains fixed at the origin. What is the kinetic energy of the particle at the instant it has moved 40 cm if (a)Q=+38 µC and (b)Q--38 µC? (a) Number: (b) Number Units Units