A 1.78 ? F capacitor that is initially uncharged is connected in series with a 7
ID: 1286512 • Letter: A
Question
A 1.78?F capacitor that is initially uncharged is connected in series with a 7.04k? resistor and an emf source with 69.8V and negligible internal resistance. The circuit is completed at t = 0.
A-) Just after the circuit is completed, what is the rate at which electrical energy is being dissipated in the resistor?
P=__________________
B-) At what value of t is the rate at which electrical energy is being dissipated in the resistor equal to the rate at which electrical energy is being stored in the capacitor?
t=_________________
C-) At the time calculated in part B, what is the rate at which electrical energy is being dissipated in the resistor?
P=________________
Explanation / Answer
1) power = V^2 / R
= 69.8^2 / 7.04 = 0.692 watts
2) I= V/R=69.8/7.04 = 9.91 amp
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