Suppose that the top plate of a parallel-plate capacitor has an electric potential of 0 V and the bottom plate has a potential of 400 V. There is a distance of 1.2 cm between the plates.
a. What is the change in potential energy of a charge of 3 x 10^-4 C that is moved from the bottom plate to the top plate?
b. What is the direction of the electrostatic force exerted on this charge when it is between the plates?
c. What is the direction of the electric field between the plates?
d. What is the magnitude of the electric field between the plates?