CHH Problem 18.61 Problem 18.61 How much energy is stored in the capacitor befor
ID: 1654160 • Letter: C
Question
CHH Problem 18.61 Problem 18.61 How much energy is stored in the capacitor before the delechric is inserted? A11.5F capactor isconnected to a-supply that eeps a constant potential difference of 26 0 V across he plates A piece of material having a dielecti constant of 3.75 is placed between the plales completely filing the space between them -299 Mr Answers Give Up Incorrect: Try Again; 4 attempts remaining How much energy is stoned in the capacitor ater the dielectric is inserted? My Answers Give Up Part C Byhow much did te ergy change during te insertion? 8 2 4Explanation / Answer
(A) Ui = C V^2 /2
= (11.5 x 10^-6) (26^2) / 2
= 3.89 x 10^-3 J
(B) C' = k C = 3.75 x 11.5 uF = 43.1 uF
Uf = (43.1 x 10^-6) (26^2) / 2
= 9.72 x 10^-3 J
(C) change in energy = Uf - Ui
= 5.83 x 10^-6 J