An nylonfilled capacitor consists of two parallel plates eac

An nylon-filled capacitor consists of two parallel plates, each with an area of 0.0400 m^3 separated by a distance of 0.00500 m. The dielectric constant is 3.40 for nylon. This capacitor is then connected to a 9.00 V battery. What is the capacitance of this capacitor? What is the charge stored on the capacitor? What is the electric field between the plates? What is the energy stored in the capacitor?

Solution

12.

Capacitance of the capacitor is

C=Ke_oA/d =3.4*(8.85*10^-12)*(0.04)/(0.005)

C=2.4*10^-10 F

13.

Charge stored in the capacitor is

Q=CV =9*(2.4*10^-10)

Q=2.16*10^-9 C

14.

Electric field

E=V/d =9/0.005

E=1800 V/m

15.

Energy stored in the capacitor is

U=(1/2)CV² =(1/2)*(2.4*10^-9)*9²

U=9.72*10^-8 J