Most of the capacitors I have encountered have been in the pico-, nano- or micro- farad range & are small in size. The exception being those used in car audio systems, which are common to be 1F and about the size of 3lbs of ground beef. The other day my friend was telling me about a 3F capacitor 1" long by .5" round. I didn't believe him; I thought it would have to be at least the size of a trash can, he was right. So now I'm puzzled. I though the farad rating determined the size, so what is it actually?