question archive You have a 75
You have a 75
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You have a 75.9-mF capacitor initially charged to a potential difference of 10.5 V. You discharge the capacitor through a 4.65-? resistor. What is the time constant? After what multiple of the time constant does the potential difference reach 2.53 V?
Time Constant: ___s
Multiple of Time Constant: ___
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Answer:
time constant T = Rc = 4.65* 75.9 =0.3529 secs
apply V = VOe^-t/RC
e^-t/RC = 2.53/10.5
-t/RC = ln (0.2409)
t = 1.42 time constants
