1. A series circuit composed of a 50-? resistor and a 10-7-F capacitor is excited with the voltage 12 sin 2t. What is the general expression for the charge on the capacitor? For the current?
2. A constant voltage of 12 V is impressed on a series circuit containing a 200-? resistor and a 10-6-F capacitor. Determine the general expression for the charge. How long will it take before the capacitor is half-charged?