Calculate the charge stored on a 3-pF capacitor with 20V across it. Determine the amount of energy stored in the capacitor.

— Example 2: Find the voltage across a 3-pF capacitor if the charge on one plate is 0.12mC. Determine the amount of energy that is stored in the capacitor.

— Example 3: Find the voltage across a 2-μF capacitor and the energy stored if the current through it is given by the following. Assume the initial voltage of the capacitor is zero.

— i(t) = 6exp(-300t)mA.

— Find the current if the voltage source is triangular.