In recent years it has been possible to buy a 1. 0 F capacitor. This is an enormously large amount of capacitance. Suppose you want to build a 1. 1 Hz oscillator with a 1. 0 F capacitor. You have a spool of 0. 25-mm-diameter wire and a 4. 0-cm-diameter plastic cylinder.
How long must your inductor be if you wrap it with 2 layers of closely spaced turns?