27. An air-filled parallel plate capacitor has square plates of length = 12.0 cm and a plate separation d = 5.00 mm. a) What is the capacitance of this capacitor? b) A 20.0-V battery is connected across the plates of the capacitor. What is the charge on each of the plates of the capacitor? c) When the 20.0-V battery is still connected across the plates, what is the magnitude of the electric field between the plates of the capacitor. The battery is now disconnected from the fully

1. A capacitor consists of two square metal plates, each measuring 5x 10-2m on a side. In between the plates is a sheet of mica measuring 1 x 10-4m thick. a) What is the capacitance of this capacitor? If the charge in one plate is 2 x 10-8C, what is the b) potential difference and c) electric field between the plates.

DI-3 A capacitor is made up of two plates of area 1.75m² separated by a dielectric of K =88.0 that is 0.125mm thick. The capacitor is charged to 250V. 1.75m² a) Find the capacitance of the capacitor in juf. b) Find the charge magnitude in µC on each plate of the capacitor. c) Find the charge magnitude in µC on each surface of the dielectric. 0.125mm d) After being charged to 250V, the capacitor is disconnected from the charging circuit and then the dielectric is slipped out from between the plates. Find the voltage across the capacitor after the dielectric has been removed.

i. A parallel plate capacitor has two square plates of side length L, and the plates are separated by distance d. How would the capacitance change if the side length of the plates doubled? ii. How would the capacitance of the above capacitor change if the separation distance between the plates doubled? iii. If I insert a dielectric material of dielectric constant κ>1 between the plates of the capacitor (there was only air there before), does the capacitance increase, decrease, or stay the same?