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A 15.0 kΩ resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 5.00 V in 1.30 µs.
(a) Find what is the time constant of the circuit (in μs).
(b) Evaluate what is the capacitance of the capacitor.
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