A 0.079 μF capacitor is being held at a potential difference of 490 μV. a) What is the charge, in coulombs, on one of the plates?  b)  If you measure the size of each plate to be 49 cm2, how far apart are the plates, in micrometers?  c)  What is the magnitude of the electric field inside this capacitor, in newtons per coulomb?

The separation distance between the two plates of a parallel plate capacitor is 2.47 cm. An electron is at rest near the negative plate. When it is released, it accelerates and reaches the positive plate with a kinetic energy of 6.30 10-15 J.What is the magnitude of the electric field in the region between the plates of the capacitor?

A proton is between the plates of a parallel plate capacitor. The charge density of the plates is 5 nC/m2. What is the acceleration of the proton?

Problem 13:   Each plate of a parallel-plate capacitor has an area of A = 0.61 m2. The plate separation is 3.0 mm, and one of these plates is shown in the figure. It carries a charge of Q = 2.9 μC, which is concentrated on its inner surface. Imagine a cylindrical Gaussian surface, of radius r = 0.012 m, whose axis is perpendicular to the plates. One end of the cylinder is inside the plate shown and the other end is located between the plates. Both ends are parallel to the plates. Part (a)  What is the flux through surface 1 Φ1, in newton meters squared per coulomb?  Part (b)  What is the flux through surface 2 (the outside of the cylinder not including the ends), in newton meters squared per coulomb?  Part (c)  What is the flux through surface 3 Φ3, in newton meters squared per coulomb?  Part (d)  Using all of your results, input an expression for the field within the capacitor E, in terms of the quantities given in the problem.