1. The voltage across a 2200-pF capacitor is vC(t) = 50 cos (2π104 t) V. Derive expressions for iC(t) and pC(t). Is the capacitor absorbing power, delivering power, or both?
2. The current through a 0.1-μF capacitor is a rectangular pulse with an amplitude of 2 mA and a duration of 5 ms. Find the capacitor voltage at the end of the pulse when the capacitor voltage at the beginning of the pulse is - 1 V.