Two different 1 F capacitors which each have a gap of 10 µm. Capacitor one has plexiglass between the plates (dielectric constant = 3.4), whereas capacitor 2 has rubber between the plates (dielectric constant = 3.0). How many times larger is the surface area on capacitor 1 compared to the surface area on capacitor 2? A1 = 1.13 A2 A1 = 0.30 A2 A1 = 0.88 A2 A1 = 3.32 A2

Which will take longer to discharge, (1) a 330 mF capacitor, or (2) a 1.18 x 10^-5 mF capacitor?

What does the dielectric material that lies between the parallel conducting surface of a capacitor, have on the ability of the capacitor to store charge and energy?

A simple adjustable parallel-plates capacitor is shown below. The plates have a radius of 8.0 cm and they are separated by a gap of 0.50 cm with nothing in between them. (a) Calculate the capacitance of this capacitor. (b) Calculate the charge stored when a battery of 9 V is connected to the capacitor. (c) Calculate the energy stored in the capacitor. (d) While the battery is still connected to the capacitor, a 0.50 cm-thick piece of wood (dielectric constant ? = 4.0) is inserted into the gap between the plates. Describe and explain what would happen to the capacitor’s voltage, to the capacitance, and to the stored charge.