College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 28

An uncharged capacitor and a resistor are connected in series to a source of emf. If = 9.00 V, C = 20.0 µ F, and R = 100 , find (a) the time constant of the circuit, (b) the maximum charge on the capacitor, and (c) the charge on the capacitor after one time constant.