In a circuit with a 40 kΩ resistor and an initially charged capacitor with C= 100...
In a circuit with a 40 kΩ resistor and an initially charged capacitor with C= 100 µF, how much time does it take for the capacitance to fall to 20% of it's initial value?
a) 3.2 s
b) 6.4 s
c) 12.8 s
d) none of the above
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