Starting with a capacitor charged to 30V, how long will it take to completely discharge it?
a.) 30 sec
b.) 10 sec
c.) The capacitor would technically never discharge completely
d.) Not enough information is given to answer this question
Since the capacitor discharge equation is given by
V_{t} = V_{o} (e^{-t/RC})
For fully discharging the capacitor,
Vt = 0
=> 0 = V_{o} (e^{-t/RC})
Vo = 30V
=>e^{-t/RC} = 0
This is only possible when,
t/RC ->
=> RC -> 0
Therefore we can say that the capacitor would never technically fully discharge
Hence,
Correct option is C
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