Chapter 10, Problem 12P

A parallel plate air capacitor has a capacitance of 4.7 $\text{μF}$ Find the new capacitance if:

a. The distance between the plates is doubled (everything else remains the same).

b. The area of the plates is doubled (everything else remains the same as for the 4.7 $\text{μF}$ level).

c. A dielectric with a relative permittivity of 20 is inserted between the plates (everything else remains the same as for the 4.7 $\text{μF}$ level).

d. A dielectric is inserted with a relative permittivity of 4, and the area is reduced to 1/3 and the distance to 1/4 of their original dimensions.