A capacitor consists of two parallel plates, each with an area of 17.0 cm2 , sep
ID: 1396539 • Letter: A
Question
A capacitor consists of two parallel plates, each with an area of 17.0 cm2 , separated by a distance of 0.150 cm . The material that fills the volume between the plates has a dielectric constant of 4.00. The plates of the capacitor are connected to a 400 V battery.
Part A
What is the capacitance of the capacitor?
C = ______ F
Part B
What is the charge on either plate?
Q = ____ C
Part C
How much energy is stored in the charged capacitor?
U = _____ J
Please click the following link so you can see, someone gave me a WRONG answer, so you dont repeat there same wrong steps or solutions:
http://www.chegg.com/homework-help/questions-and-answers/capacitor-consists-two-parallel-plates-area-170-cm2-separated-distance-0150-cm--material-f-q7775075
Explanation / Answer
A) C = K*A*epsilon/d
= 4*17*10^-4*8.854*10^-12/(0.15*10^-2)
= 4.02*10^-11 F or 40.2 pF
B) Q = C*V
= 4.02*10^-11*400
= 1.608*10^-8 C or 16.08 nC
C) U = 0.5*C*V^2
= 0.5*4.02*10^-11*400^2
= 3.22*10^-6 J or 3.22 micro J
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