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Consider the circuit shown in the figure. A short time after closing the switch, the charge on the capacitor is 85.0% of its initial charge. Assume the circuit has a time
constant of 19.2 s.
+Q
R
w
(a) Calculate the time interval required (in s) for the capacitor to reach this charge.
S
(b) If R
= 280 k2, what is the value of C (in μF)?
μF

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